string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=qq%E6%B7%BB%E5%8A%A0%E5%A5%BD%E5%8F%8B%E7%9A%84%E4%BF%A1%E6%81%AF%E8%83%BD%E4%BF%9D%E6%8C%81%E5%A4%9A%E4%B9%85%E6%9C%89%E6%95%88 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
qq添加好友的信息能保持多久有效
