string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%A8%E5%85%B3%E8%81%94%E8%AF%8D%E8%AF%AD%E8%BF%9E%E6%8E%A5%E4%B8%A4%E5%8F%A5%E8%AF%9D => Failed to connect to 101.89.143.195 port 38205: Connection refused"
用关联词语连接两句话
