string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E5%B8%82%E6%94%BF%E4%B8%93%E4%B8%9A%E5%BE%88%E9%9A%BE%E5%90%97 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
二建市政专业很难吗
