string(260) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=wifi%E6%98%BE%E7%A4%BA%E7%BD%91%E7%BB%9C%E5%8F%97%E9%99%90%E5%A6%82%E4%BD%95%E8%A7%A3%E5%86%B3 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
wifi显示网络受限如何解决
