string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%B5%B5%E7%9F%A5%E5%90%AF%E8%AE%B2%E5%BE%97%E6%80%8E%E4%B9%88%E6%A0%B7%E7%9F%A5%E4%B9%8E => Failed to connect to 61.171.74.35 port 38027: Connection refused"
赵知启讲得怎么样知乎
