string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%93%AA%E4%B8%AAdns%E7%BD%91%E9%80%9F%E5%BF%AB%E7%A8%B3%E5%AE%9A => Failed to connect to 125.88.227.171 port 38062: Connection refused"
哪个dns网速快稳定
