diff --git a/IPRangeLoader.go b/IPRangeLoader.go
deleted file mode 100644
index b144263..0000000
--- a/IPRangeLoader.go
+++ /dev/null
@@ -1,177 +0,0 @@
-package main
-
-import (
-	"CloudflareSpeedTest/task"
-	"bufio"
-	"log"
-	"net"
-	"os"
-	"strconv"
-	"strings"
-)
-
-// 根据子网掩码获取主机数量
-func getCidrHostNum(maskLen int) int {
-	cidrIPNum := int(0)
-	if maskLen < 32 {
-		var i int = int(32 - maskLen - 1)
-		for ; i >= 1; i-- {
-			cidrIPNum += 1 << i
-		}
-		cidrIPNum += 2
-	} else {
-		cidrIPNum = 1
-	}
-	if cidrIPNum > 255 {
-		cidrIPNum = 255
-	}
-	return cidrIPNum
-}
-
-// 获取 IP 最后一段最小值和最大值
-func getCidrIPRange(cidr string) (uint8, uint8) {
-	ip := strings.Split(cidr, "/")[0]
-	ipSegs := strings.Split(ip, ".")
-	maskLen, _ := strconv.Atoi(strings.Split(cidr, "/")[1])
-	seg4MinIP, seg4MaxIP := getIPSeg4Range(ipSegs, maskLen)
-	//ipPrefix := ipSegs[0] + "." + ipSegs[1] + "." + ipSegs[2] + "."
-
-	return seg4MinIP, seg4MaxIP
-}
-
-// 获取 IP 最后一段的区间
-func getIPSeg4Range(ipSegs []string, maskLen int) (uint8, uint8) {
-	ipSeg, _ := strconv.Atoi(ipSegs[3])
-	return getIPSegRange(uint8(ipSeg), uint8(32-maskLen))
-}
-
-// 根据输入的基础IP地址和CIDR掩码计算一个IP片段的区间
-func getIPSegRange(userSegIP, offset uint8) (uint8, uint8) {
-	var ipSegMax uint8 = 255
-	netSegIP := ipSegMax << offset
-	segMinIP := netSegIP & userSegIP
-	segMaxIP := userSegIP&(255<<offset) | ^(255 << offset)
-	return uint8(segMinIP), uint8(segMaxIP)
-}
-
-func loadFirstIPOfRangeFromFile(ipFile string) []net.IPAddr {
-	file, err := os.Open(ipFile)
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer file.Close()
-	firstIPs := make([]net.IPAddr, 0)
-	scanner := bufio.NewScanner(file)
-	scanner.Split(bufio.ScanLines)
-	for scanner.Scan() {
-		IPString := scanner.Text()
-		if !strings.Contains(IPString, "/") { // 如果不含有 / 则代表不是 IP 段，而是一个单独的 IP，因此需要加上 /32 /128 子网掩码
-			if task.IPv6 {
-				IPString += "/128"
-			} else {
-				IPString += "/32"
-			}
-		}
-		firstIP, IPRange, err := net.ParseCIDR(IPString)
-		//fmt.Println(firstIP)
-		//fmt.Println(IPRange)
-		if err != nil {
-			log.Fatal(err)
-		}
-		if !task.IPv6 { // IPv4
-			minIP, maxIP := getCidrIPRange(IPString)                 // 获取 IP 最后一段最小值和最大值
-			Mask, _ := strconv.Atoi(strings.Split(IPString, "/")[1]) // 获取子网掩码
-			MaxIPNum := getCidrHostNum(Mask)                         // 根据子网掩码获取主机数量
-			for IPRange.Contains(firstIP) {
-				if task.TestAll { // 如果是测速全部 IP
-					for i := minIP; i <= maxIP; i++ { // 遍历 IP 最后一段最小值到最大值
-						firstIP[15] = i
-						firstIPCopy := make([]byte, len(firstIP))
-						copy(firstIPCopy, firstIP)
-						firstIPs = append(firstIPs, net.IPAddr{IP: firstIPCopy})
-					}
-				} else { // 随机 IP 的最后一段 0.0.0.X
-					firstIP[15] = minIP + randipEndWith(MaxIPNum)
-					firstIPCopy := make([]byte, len(firstIP))
-					copy(firstIPCopy, firstIP)
-					firstIPs = append(firstIPs, net.IPAddr{IP: firstIPCopy})
-				}
-				firstIP[14]++ // 0.0.(X+1).X
-				if firstIP[14] == 0 {
-					firstIP[13]++ // 0.(X+1).X.X
-					if firstIP[13] == 0 {
-						firstIP[12]++ // (X+1).X.X.X
-					}
-				}
-			}
-		}
-		//IPv6
-		var tempIP uint8
-		for IPRange.Contains(firstIP) {
-			//fmt.Println(firstIP)
-			//fmt.Println(firstIP[0], firstIP[1], firstIP[2], firstIP[3], firstIP[4], firstIP[5], firstIP[6], firstIP[7], firstIP[8], firstIP[9], firstIP[10], firstIP[11], firstIP[12], firstIP[13], firstIP[14], firstIP[15])
-			if !strings.Contains(IPString, "/128") {
-				firstIP[15] = randipEndWith(255) // 随机 IP 的最后一段
-				firstIP[14] = randipEndWith(255) // 随机 IP 的最后一段
-			}
-			firstIPCopy := make([]byte, len(firstIP))
-			copy(firstIPCopy, firstIP)
-			firstIPs = append(firstIPs, net.IPAddr{IP: firstIPCopy})
-			tempIP = firstIP[13]
-			firstIP[13] += randipEndWith(255)
-			if firstIP[13] < tempIP {
-				tempIP = firstIP[12]
-				firstIP[12] += randipEndWith(255)
-				if firstIP[12] < tempIP {
-					tempIP = firstIP[11]
-					firstIP[11] += randipEndWith(255)
-					if firstIP[11] < tempIP {
-						tempIP = firstIP[10]
-						firstIP[10] += randipEndWith(255)
-						if firstIP[10] < tempIP {
-							tempIP = firstIP[9]
-							firstIP[9] += randipEndWith(255)
-							if firstIP[9] < tempIP {
-								tempIP = firstIP[8]
-								firstIP[8] += randipEndWith(255)
-								if firstIP[8] < tempIP {
-									tempIP = firstIP[7]
-									firstIP[7] += randipEndWith(255)
-									if firstIP[7] < tempIP {
-										tempIP = firstIP[6]
-										firstIP[6] += randipEndWith(255)
-										if firstIP[6] < tempIP {
-											tempIP = firstIP[5]
-											firstIP[5] += randipEndWith(255)
-											if firstIP[5] < tempIP {
-												tempIP = firstIP[4]
-												firstIP[4] += randipEndWith(255)
-												if firstIP[4] < tempIP {
-													tempIP = firstIP[3]
-													firstIP[3] += randipEndWith(255)
-													if firstIP[3] < tempIP {
-														tempIP = firstIP[2]
-														firstIP[2] += randipEndWith(255)
-														if firstIP[2] < tempIP {
-															tempIP = firstIP[1]
-															firstIP[1] += randipEndWith(255)
-															if firstIP[1] < tempIP {
-																tempIP = firstIP[0]
-																firstIP[0] += randipEndWith(255)
-															}
-														}
-													}
-												}
-											}
-										}
-									}
-								}
-							}
-						}
-					}
-				}
-			}
-		}
-	}
-	return firstIPs
-}
diff --git a/main.go b/main.go
index 1beac0f..6830712 100644
--- a/main.go
+++ b/main.go
@@ -67,7 +67,7 @@ https://github.com/XIU2/CloudflareSpeedTest
 	flag.DurationVar(&utils.InputMaxDelay, "tl", 9999*time.Millisecond, "平均延迟上限")
 	flag.DurationVar(&utils.InputMinDelay, "tll", time.Duration(0), "平均延迟下限")
 	flag.DurationVar(&task.Timeout, "dt", 10*time.Second, "下载测速时间")
-	flag.IntVar(&task.TestCount, "dn", 20, "下载测速数量")
+	flag.IntVar(&task.TestCount, "dn", 10, "下载测速数量")
 	flag.StringVar(&task.URL, "url", "https://cf.xiu2.xyz/Github/CloudflareSpeedTest.png", "下载测速地址")
 	flag.BoolVar(&task.Disable, "dd", false, "禁用下载测速")
 	flag.BoolVar(&task.IPv6, "ipv6", false, "启用IPv6")
@@ -94,9 +94,7 @@ https://github.com/XIU2/CloudflareSpeedTest
 }
 
 func main() {
-	go checkUpdate()                          // 检查版本更新
-	ips := task.LoadIPRanges()
-	// ips := loadFirstIPOfRangeFromFile(task.IPFile) // 读入IP
+	go checkUpdate() // 检查版本更新
 
 	// 开始延迟测速
 	fmt.Printf("# XIU2/CloudflareSpeedTest %s \n", version)
@@ -106,7 +104,7 @@ func main() {
 	}
 	fmt.Printf("开始延迟测速（模式：TCP %s，端口：%d ，平均延迟上限：%v，平均延迟下限：%v)\n", ipVersion, task.TCPPort, utils.InputMaxDelay, utils.InputMinDelay)
 
-	pingData := task.NewPing(ips).Run().FilterDelay()
+	pingData := task.NewPing().Run().FilterDelay()
 	speedData := task.TestDownloadSpeed(pingData)
 	utils.ExportCsv(speedData)
 	speedData.Print(task.IPv6)
diff --git a/task/download.go b/task/download.go
index bff3502..1c1ab8e 100644
--- a/task/download.go
+++ b/task/download.go
@@ -18,8 +18,8 @@ const (
 	bufferSize                     = 1024
 	defaultURL                     = "https://cf.xiu2.xyz/Github/CloudflareSpeedTest.png"
 	defaultTimeout                 = 10 * time.Second
-	defaultDisableDownlaod         = false
-	defaultTestNum                 = 20
+	defaultDisableDownload         = false
+	defaultTestNum                 = 10
 	defaultMinSpeed        float64 = 0.0
 )
 
@@ -29,7 +29,7 @@ var (
 	// download timeout
 	Timeout = defaultTimeout
 	// disable download
-	Disable = defaultDisableDownlaod
+	Disable = defaultDisableDownload
 
 	TestCount = defaultTestNum
 	MinSpeed  = defaultMinSpeed
diff --git a/task/ip.go b/task/ip.go
index d22af3c..f3e4d1e 100644
--- a/task/ip.go
+++ b/task/ip.go
@@ -27,7 +27,7 @@ func randipEndWith(num int) uint8 {
 	return uint8(rand.Intn(num))
 }
 
-func LoadIPRanges() []*net.IPAddr {
+func loadIPRanges() []*net.IPAddr {
 	if IPFile == "" {
 		IPFile = defaultInputFile
 	}
@@ -38,64 +38,72 @@ func LoadIPRanges() []*net.IPAddr {
 	defer file.Close()
 	firstIPs := make([]*net.IPAddr, 0)
 	scanner := bufio.NewScanner(file)
-	// scanner.Split(bufio.ScanLines)
 	for scanner.Scan() {
-		IPString := scanner.Text()
+		ipString := scanner.Text()
 		// 如果不含有 '/' 则代表不是 IP 段，而是一个单独的 IP，因此需要加上 /32 /128 子网掩码
-		if !strings.Contains(IPString, "/") {
+		if !strings.Contains(ipString, "/") {
+			mask := "/32"
 			if IPv6 {
-				IPString += "/128"
-			} else {
-				IPString += "/32"
+				mask = "/128"
 			}
-		}
-		firstIP, IPRange, err := net.ParseCIDR(IPString)
-		// fmt.Println(firstIP)
-		// fmt.Println(IPRange)
-		if err != nil {
-			log.Fatal(err)
+			ipString += mask
 		}
 		if IPv6 {
 			//IPv6
-			loadIPv6(IPString, IPRange, firstIP, firstIPs)
+			firstIPs = append(firstIPs, loadIPv6(ipString)...)
 			continue
 		}
 		// IPv4
-		minIP, maxIP, mask := getCidrIPRange(IPString) // 获取 IP 最后一段最小值和最大值
-		maxIPNum := getCidrHostNum(mask)               // 根据子网掩码获取主机数量
-		for IPRange.Contains(firstIP) {
-			if TestAll { // 如果是测速全部 IP
-				for i := minIP; i <= maxIP; i++ { // 遍历 IP 最后一段最小值到最大值
-					firstIP[15] = i
-					firstIPCopy := make([]byte, len(firstIP))
-					copy(firstIPCopy, firstIP)
-					firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
-				}
-			} else { // 随机 IP 的最后一段 0.0.0.X
-				firstIP[15] = minIP + randipEndWith(maxIPNum)
-				firstIPCopy := make([]byte, len(firstIP))
-				copy(firstIPCopy, firstIP)
-				firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
-			}
-			firstIP[14]++ // 0.0.(X+1).X
-			if firstIP[14] == 0 {
-				firstIP[13]++ // 0.(X+1).X.X
-				if firstIP[13] == 0 {
-					firstIP[12]++ // (X+1).X.X.X
-				}
-			}
-		}
-
+		firstIPs = append(firstIPs, loadIPv4(ipString)...)
 	}
 	return firstIPs
 }
 
-func loadIPv6(IPString string, IPRange *net.IPNet, firstIP net.IP, firstIPs []*net.IPAddr) {
+func loadIPv4(ipString string) (firstIPs []*net.IPAddr) {
+	firstIP, IPRange, err := net.ParseCIDR(ipString)
+	// fmt.Println(firstIP)
+	// fmt.Println(IPRange)
+	if err != nil {
+		log.Fatal(err)
+	}
+	minIP, maxIP, hostNum := getCidrIPRange(ipString) // 获取 IP 最后一段最小值和最大值
+	for IPRange.Contains(firstIP) {
+		if TestAll { // 如果是测速全部 IP
+			for i := minIP; i <= maxIP; i++ { // 遍历 IP 最后一段最小值到最大值
+				firstIP[15] = i
+				firstIPCopy := make([]byte, len(firstIP))
+				copy(firstIPCopy, firstIP)
+				firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
+			}
+		} else { // 随机 IP 的最后一段 0.0.0.X
+			firstIP[15] = minIP + randipEndWith(hostNum)
+			firstIPCopy := make([]byte, len(firstIP))
+			copy(firstIPCopy, firstIP)
+			firstIPs = append(firstIPs, &net.IPAddr{IP: firstIPCopy})
+		}
+		firstIP[14]++ // 0.0.(X+1).X
+		if firstIP[14] == 0 {
+			firstIP[13]++ // 0.(X+1).X.X
+			if firstIP[13] == 0 {
+				firstIP[12]++ // (X+1).X.X.X
+			}
+		}
+	}
+	return
+}
+
+func loadIPv6(ipString string) (firstIPs []*net.IPAddr) {
+	firstIP, IPRange, err := net.ParseCIDR(ipString)
+	// fmt.Println(firstIP)
+	// fmt.Println(IPRange)
+	if err != nil {
+		log.Fatal(err)
+	}
 	var tempIP uint8
 	for IPRange.Contains(firstIP) {
 		//fmt.Println(firstIP)
 		//fmt.Println(firstIP[0], firstIP[1], firstIP[2], firstIP[3], firstIP[4], firstIP[5], firstIP[6], firstIP[7], firstIP[8], firstIP[9], firstIP[10], firstIP[11], firstIP[12], firstIP[13], firstIP[14], firstIP[15])
-		if !strings.Contains(IPString, "/128") {
+		if !strings.Contains(ipString, "/128") {
 			firstIP[15] = randipEndWith(255) // 随机 IP 的最后一段
 			firstIP[14] = randipEndWith(255) // 随机 IP 的最后一段
 		}
@@ -170,41 +178,44 @@ func loadIPv6(IPString string, IPRange *net.IPNet, firstIP net.IP, firstIPs []*n
 		tempIP = firstIP[0]
 		firstIP[0] += randipEndWith(255)
 	}
+	return
 }
 
 // 根据子网掩码获取主机数量
-func getCidrHostNum(maskLen int) int {
-	cidrIPNum := int(0)
-	if maskLen < 32 {
-		var i int = int(32 - maskLen - 1)
-		for ; i >= 1; i-- {
-			cidrIPNum += 1 << i
+func getCIDRHostNum(mask uint8) (subnetNum int) {
+	if mask >= 32 {
+		return 1
+	}
+
+	if mask < 32 {
+		for i := int(32 - mask - 1); i >= 1; i-- {
+			subnetNum += 1 << i
 		}
-		cidrIPNum += 2
-	} else {
-		cidrIPNum = 1
+		subnetNum += 2
 	}
-	if cidrIPNum > 255 {
-		cidrIPNum = 255
+	if subnetNum > 0xFF {
+		subnetNum = 0xFF
 	}
-	return cidrIPNum
+	return
 }
 
-// 获取 IP 最后一段最小值和最大值、子网掩码
-func getCidrIPRange(cidr string) (minIP, maxIP uint8, mask int) {
-	ipRange := strings.Split(cidr, "/")
-	ipSegs := strings.Split(ipRange[0], ".")
-	mask, _ = strconv.Atoi(ipRange[1])
-	seg4, _ := strconv.Atoi(ipSegs[3])
+// 获取 IP 最后一段最小值和最大值、主机数量
+func getCidrIPRange(cidr string) (minIP, maxIP uint8, ipNum int) {
+	i := strings.IndexByte(cidr, '/')
+	addr := cidr[:i]
+	mask, _ := strconv.ParseUint(cidr[i+1:], 10, 8)
+	i = strings.LastIndexByte(addr, '.')
+	seg4, _ := strconv.ParseUint(addr[i+1:], 10, 8)
 	minIP, maxIP = getIPSegRange(uint8(seg4), uint8(32-mask))
+	ipNum = getCIDRHostNum(uint8(mask))
 	return
 }
 
 // 根据输入的基础IP地址和CIDR掩码计算一个IP片段的区间
 func getIPSegRange(userSegIP, offset uint8) (uint8, uint8) {
-	var ipSegMax uint8 = 255
+	var ipSegMax uint8 = 0xFF
 	netSegIP := ipSegMax << offset
 	segMinIP := netSegIP & userSegIP
-	segMaxIP := userSegIP&(255<<offset) | ^(255 << offset)
+	segMaxIP := userSegIP&(0xFF<<offset) | ^(0xFF << offset)
 	return segMinIP, segMaxIP
 }
diff --git a/task/tcping.go b/task/tcping.go
index caf657e..054d360 100644
--- a/task/tcping.go
+++ b/task/tcping.go
@@ -45,8 +45,9 @@ func checkPingDefault() {
 	}
 }
 
-func NewPing(ips []*net.IPAddr) *Ping {
+func NewPing() *Ping {
 	checkPingDefault()
+	ips := loadIPRanges()
 	return &Ping{
 		wg:      &sync.WaitGroup{},
 		m:       &sync.Mutex{},
diff --git a/util.go b/util.go
deleted file mode 100644
index e1117ab..0000000
--- a/util.go
+++ /dev/null
@@ -1,164 +0,0 @@
-package main
-
-import (
-	"encoding/csv"
-	"log"
-	"math/rand"
-	"net"
-	"os"
-	"strconv"
-	"time"
-
-	"github.com/cheggaaa/pb/v3"
-)
-
-type CloudflareIPData struct {
-	ip            net.IPAddr
-	pingCount     int
-	pingReceived  int
-	recvRate      float32
-	downloadSpeed float32
-	pingTime      time.Duration
-}
-
-func (cf *CloudflareIPData) getRecvRate() float32 {
-	if cf.recvRate == 0 {
-		pingLost := cf.pingCount - cf.pingReceived
-		cf.recvRate = float32(pingLost) / float32(cf.pingCount)
-	}
-	return cf.recvRate
-}
-
-func ExportCsv(filePath string, data []CloudflareIPData) {
-	fp, err := os.Create(filePath)
-	if err != nil {
-		log.Fatalf("创建文件[%s]失败：%v", filePath, err)
-		return
-	}
-	defer fp.Close()
-	w := csv.NewWriter(fp) //创建一个新的写入文件流
-	w.Write([]string{"IP 地址", "已发送", "已接收", "丢包率", "平均延迟", "下载速度 (MB/s)"})
-	w.WriteAll(convertToString(data))
-	w.Flush()
-}
-
-func (cf *CloudflareIPData) toString() []string {
-	result := make([]string, 6)
-	result[0] = cf.ip.String()
-	result[1] = strconv.Itoa(cf.pingCount)
-	result[2] = strconv.Itoa(cf.pingReceived)
-	result[3] = strconv.FormatFloat(float64(cf.getRecvRate()), 'f', 2, 32)
-	result[4] = cf.pingTime.String()
-	result[5] = strconv.FormatFloat(float64(cf.downloadSpeed)/1024/1024, 'f', 2, 32)
-	return result
-}
-
-func convertToString(data []CloudflareIPData) [][]string {
-	result := make([][]string, 0)
-	for _, v := range data {
-		result = append(result, v.toString())
-	}
-	return result
-}
-
-var pingTime int
-var pingRoutine int
-
-type progressEvent int
-
-const (
-	NoAvailableIPFound progressEvent = iota
-	AvailableIPFound
-	NormalPing
-)
-
-var url string
-
-var downloadTestTime time.Duration
-
-const downloadBufferSize = 1024
-
-var downloadTestCount int
-
-//const defaultTcpPort = 443
-const tcpConnectTimeout = time.Second * 1
-
-var failTime int
-
-// 平均延迟排序（丢包另算）
-type CloudflareIPDataSet []CloudflareIPData
-
-// 下载速度排序
-type CloudflareIPDataSetD []CloudflareIPData
-
-func initRandSeed() {
-	rand.Seed(time.Now().UnixNano())
-}
-
-func randipEndWith(num int) uint8 {
-	return uint8(rand.Intn(num))
-}
-
-func GetRandomString() string {
-	str := "0123456789abcdef"
-	bytes := []byte(str)
-	result := []byte{}
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
-	for i := 0; i < 4; i++ {
-		result = append(result, bytes[r.Intn(len(bytes))])
-	}
-	return string(result)
-}
-
-func ipPadding(ip string) string {
-	var ipLength int
-	var ipPrint string
-	ipPrint = ip
-	ipLength = len(ipPrint)
-	if ipLength < 15 {
-		for i := 0; i <= 15-ipLength; i++ {
-			ipPrint += " "
-		}
-	}
-	return ipPrint
-}
-
-func handleProgressGenerator(pb *pb.ProgressBar) func(e progressEvent) {
-	return func(e progressEvent) {
-		switch e {
-		case NoAvailableIPFound:
-			pb.Add(pingTime)
-		case AvailableIPFound:
-			pb.Add(failTime)
-		case NormalPing:
-			pb.Increment()
-		}
-	}
-}
-
-func (cfs CloudflareIPDataSet) Len() int {
-	return len(cfs)
-}
-
-func (cfs CloudflareIPDataSet) Less(i, j int) bool {
-	if (cfs)[i].getRecvRate() != cfs[j].getRecvRate() {
-		return cfs[i].getRecvRate() < cfs[j].getRecvRate()
-	}
-	return cfs[i].pingTime < cfs[j].pingTime
-}
-
-func (cfs CloudflareIPDataSet) Swap(i, j int) {
-	cfs[i], cfs[j] = cfs[j], cfs[i]
-}
-
-func (cfs CloudflareIPDataSetD) Len() int {
-	return len(cfs)
-}
-
-func (cfs CloudflareIPDataSetD) Less(i, j int) bool {
-	return cfs[i].downloadSpeed > cfs[j].downloadSpeed
-}
-
-func (cfs CloudflareIPDataSetD) Swap(i, j int) {
-	cfs[i], cfs[j] = cfs[j], cfs[i]
-}
diff --git a/utils/csv.go b/utils/csv.go
index a4b4d0a..6240d72 100644
--- a/utils/csv.go
+++ b/utils/csv.go
@@ -10,14 +10,15 @@ import (
 	"time"
 )
 
-const defaultOutput = "result.csv"
+const (
+	defaultOutput = "result.csv"
+	maxDelay      = 9999 * time.Millisecond
+	minDelay      = time.Duration(0)
+)
 
 var (
-	MaxDelay = 9999 * time.Millisecond
-	MinDelay = time.Duration(0)
-
-	InputMaxDelay = MaxDelay
-	InputMinDelay = MinDelay
+	InputMaxDelay = maxDelay
+	InputMinDelay = minDelay
 	Output        = defaultOutput
 	PrintNum      = 20
 )
@@ -81,14 +82,14 @@ func convertToString(data []CloudflareIPData) [][]string {
 type PingDelaySet []CloudflareIPData
 
 func (s PingDelaySet) FilterDelay() (data PingDelaySet) {
-	if InputMaxDelay >= MaxDelay || InputMinDelay <= MinDelay {
+	if InputMaxDelay >= maxDelay || InputMinDelay <= minDelay {
 		return s
 	}
 	for _, v := range s {
-		if v.Delay > MaxDelay { // 平均延迟上限
+		if v.Delay > maxDelay { // 平均延迟上限
 			break
 		}
-		if v.Delay <= MinDelay { // 平均延迟下限
+		if v.Delay <= minDelay { // 平均延迟下限
 			continue
 		}
 		data = append(data, v) // 延迟满足条件时，添加到新数组中
@@ -146,4 +147,4 @@ func (s DownloadSpeedSet) Print(ipv6 bool) {
 	for i := 0; i < PrintNum; i++ {
 		fmt.Printf(dataFormat, dateString[i][0], dateString[i][1], dateString[i][2], dateString[i][3], dateString[i][4], dateString[i][5])
 	}
-}
\ No newline at end of file
+}