string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ol%E7%9A%84%E7%94%B5%E8%84%91%E9%85%8D%E7%BD%AE%E8%A6%81%E6%B1%82 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
ol的电脑配置要求
