string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%BA%E4%BB%80%E4%B9%88%E7%BD%91%E7%BB%9C%E5%8F%97%E9%99%90%E8%BF%9E%E4%B8%8D%E4%B8%8A => Failed to connect to 101.89.143.195 port 38205: Connection refused"
为什么网络受限连不上
