string(251) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%A1%BA%E4%B8%B018%E5%85%83%E4%B8%8E22%E5%85%83%E5%B7%AE%E5%88%AB%E5%A4%A7%E5%90%97 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
顺丰18元与22元差别大吗
