string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E8%BF%9E%E6%8E%A5%E6%AD%A3%E5%B8%B8%E4%BD%86%E6%97%A0%E6%B3%95%E4%B8%8A%E7%BD%91 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
网络连接正常但无法上网
