Go语言中如何处理并发网络请求的请求重试算法问题？

package main

import (
    "fmt"
    "net/http"
    "time"
)

// 请求重试的最大次数
const MaxRetries = 3

// 请求重试的间隔时间
const RetryInterval = time.Second

func main() {
    urls := []string{
        "https://www.example.com",
        "https://www.google.com",
        "https://www.bing.com",
    }

    results := make(chan *http.Response, len(urls))

    for _, url := range urls {
        go fetchWithRetry(url, results)
    }

    for i := 0; i < len(urls); i++ {
        response := <-results
        if response != nil {
            fmt.Printf("Success: %s
", response.Request.URL)
        } else {
            fmt.Println("Error: request failed")
        }
    }
}

func fetchWithRetry(url string, results chan<- *http.Response) {
    for i := 0; i < MaxRetries; i++ {
        response, err := http.Get(url)
        if err == nil {
            results <- response
            return
        }
        fmt.Printf("Retrying (%d): %s
", i+1, url)
        time.Sleep(RetryInterval)
    }
    results <- nil
}