string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AE%BD%E5%B8%A6%E9%80%9F%E5%BA%A6%E5%AF%B9%E7%85%A7%E8%A1%A8 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
宽带速度对照表
