string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%9D%E7%BA%A7%E5%AE%9E%E5%8A%A1%E7%8E%8B%E9%A2%96%E8%AE%B2%E7%9A%84%E6%80%8E%E6%A0%B7 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
初级实务王颖讲的怎样
