string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%B4%A0%E8%B4%A8%E8%83%BD%E5%8A%9B%E4%B8%8D%E8%B6%B3%E7%9A%84%E8%A1%A8%E7%8E%B0 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
素质能力不足的表现
