string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AE%B6%E5%A2%83%E4%B8%8D%E5%A5%BD%E6%83%B3%E5%87%BA%E5%9B%BD%E8%AF%BB%E7%A0%94 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
家境不好想出国读研
