问题解构三步走
1.认识问题
现场日志
Get "https://proxy.golang.org/rsc.io/quote/@v/list": dial tcp 172 .217.163.49:443:
connectex: A connection attempt failed because the connected party did not properly respond after a period of time,
or established connection failed because connected host has failed to respond.
2.分析问题
通过日志找线索，原因可能是连接超时或建立连接失败。
3.解决问题
通过 env 修改代理服务器 GoProxy
E:\go\hello>go env -w GOPROXY=https://goproxy.cn