string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E5%90%8D%E5%B8%88%E8%AE%B2%E4%B9%89%E6%9C%89%E7%94%A8%E5%90%97 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
一建名师讲义有用吗
