string(249) "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%E8%BF%9B%E4%B8%80%E6%AD%A5%E6%8F%90%E5%8D%87 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
素质能力进一步提升
