string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%83%AD%E7%82%9C%E5%B8%82%E6%94%BF2019%E7%B2%BE%E8%AE%B2%E8%A7%86%E9%A2%91%E7%99%BE%E5%BA%A6%E4%BA%91 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
郭炜市政2019精讲视频百度云
