string(286) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%A1%BA%E4%B8%B0%E9%80%9F%E8%BF%9018%E5%85%83%E5%92%8C23%E5%85%83%E5%8C%BA%E5%88%AB%E5%9C%A8%E5%93%AA%E9%87%8C%E5%91%A2 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
顺丰速运18元和23元区别在哪里呢
