diff --git a/IPRangeLoader.go b/IPRangeLoader.go
index dd6884e..9b6c725 100644
--- a/IPRangeLoader.go
+++ b/IPRangeLoader.go
@@ -21,8 +21,9 @@ func loadFirstIPOfRangeFromFile(ipFile string) []net.IPAddr {
 		if err != nil {
 			log.Fatal(err)
 		}
-		firstIP[15] = ipEndWith
 		for IPRange.Contains(firstIP) {
+			randipEndWith() // 随机 IP 的最后一段
+			firstIP[15] = ipEndWith
 			firstIPCopy := make([]byte, len(firstIP))
 			copy(firstIPCopy, firstIP)
 			firstIPs = append(firstIPs, net.IPAddr{IP: firstIPCopy})
diff --git a/README.md b/README.md
index 2354a8f..867703a 100644
--- a/README.md
+++ b/README.md
@@ -28,23 +28,23 @@
 
 ```
 IP 地址           已发送  已接收  丢包率  平均延迟  下载速度 (MB/s)
-104.27.200.105    4       4       0.00    135.77    13.21
-104.27.205.105    4       4       0.00    136.65    17.33
-104.27.207.105    4       4       0.00    136.97    5.55
-104.27.193.105    4       4       0.00    146.97    16.54
-104.27.206.105    4       4       0.00    148.04    1.65
-104.27.192.105    4       4       0.00    148.97    9.08
-104.27.195.105    4       4       0.00    150.29    21.00
-104.27.197.105    4       4       0.00    151.04    13.61
-104.27.203.105    4       4       0.00    151.54    15.73
-104.27.204.105    4       4       0.00    151.94    8.32
+104.27.199.141    4       4       0.00    139.52    11.71
+104.22.73.158     4       4       0.00    141.38    6.74
+104.27.204.240    4       4       0.00    142.02    4.65
+104.22.72.117     4       4       0.00    143.63    12.00
+104.22.75.117     4       4       0.00    145.75    3.92
+104.22.77.24      4       4       0.00    146.00    5.86
+104.22.66.140     4       4       0.00    146.50    9.47
+104.22.78.104     4       4       0.00    146.75    13.00
+104.22.69.208     4       4       0.00    147.00    19.07
+104.27.194.10     4       4       0.00    148.02    21.05
 ```
 
 完整结果保存在当前目录下的 `result.csv` 文件中，用**记事本/表格软件**打开，排序为**延迟由低到高**，分别是：  
 
 ```
 IP 地址, 已发送, 已接收, 丢包率, 平均延迟, 下载速度 (MB/s)
-104.27.200.105, 4, 4, 0.00, 135.77, 13.21
+104.27.199.141, 4, 4, 0.00, 139.52, 11.71
 ```
 
 选择一个平均延迟与下载速度都不错的 IP 放到 `Hosts` 文件中（指向使用 Cloudflare CDN 的网站域名）。  
diff --git a/main.go b/main.go
index ded9eb7..eff7ced 100644
--- a/main.go
+++ b/main.go
@@ -103,7 +103,7 @@ https://github.com/XIU2/CloudflareSpeedTest
 }
 
 func main() {
-	initipEndWith()                           // 随机数
+	initRandSeed()                            // 置随机数种子
 	failTime = pingTime                       // 设置接收次数
 	ips := loadFirstIPOfRangeFromFile(ipFile) // 读入IP
 	pingCount := len(ips) * pingTime          // 计算进度条总数（IP*测试次数）
@@ -160,7 +160,7 @@ func main() {
 			}
 			fmt.Printf("%-16s%-5s%-5s%-5s%-6s%-11s\n", "IP 地址", "已发送", "已接收", "丢包率", "平均延迟", "下载速度 (MB/s)")
 			for i := 0; i < printResult; i++ {
-				fmt.Printf("%-18s%-8s%-8s%-8s%-10s%-15s\n", dateString[i][0], dateString[i][1], dateString[i][2], dateString[i][3], dateString[i][4], dateString[i][5])
+				fmt.Printf("%-18s%-8s%-8s%-8s%-10s%-15s\n", ipPadding(dateString[i][0]), dateString[i][1], dateString[i][2], dateString[i][3], dateString[i][4], dateString[i][5])
 			}
 			if outputFile != "" {
 				fmt.Printf("\n完整内容请查看 %v 文件。请按 回车键 或 Ctrl+C 退出。", outputFile)
diff --git a/util.go b/util.go
index 59cb37c..3e197d1 100644
--- a/util.go
+++ b/util.go
@@ -89,11 +89,27 @@ var failTime int
 
 type CloudflareIPDataSet []CloudflareIPData
 
-func initipEndWith() {
+func initRandSeed() {
 	rand.Seed(time.Now().UnixNano())
+}
+
+func randipEndWith() {
 	ipEndWith = uint8(rand.Intn(254) + 1)
 }
 
+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 {