string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%99%88%E5%B0%8F%E7%90%83%E8%80%81%E5%B8%88%E8%AE%B2%E5%BE%97%E5%A5%BD%E5%90%97 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
陈小球老师讲得好吗
