string(285) "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%E9%82%A3%E4%B8%AA%E8%80%81%E5%B8%88%E8%AE%B2%E5%BE%97%E6%AF%94%E8%BE%83%E5%A5%BD => Failed to connect to 101.89.159.206 port 38100: Connection refused"
二建市政那个老师讲得比较好
