string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%9D%A2%E8%AF%95%E5%B8%B8%E7%94%A8%E9%97%AE%E7%AD%94%E9%A2%98 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
面试常用问答题
