string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%8A%E7%8F%AD%E8%B7%9F%E4%B8%8A%E5%AD%A6%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 14.18.117.71 port 38069: Connection refused"
上班跟上学的区别
