string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%9C%B2%E8%90%A5%E9%9C%80%E8%A6%81%E5%81%9A%E5%93%AA%E4%BA%9B%E5%87%86%E5%A4%87%E5%B7%A5%E4%BD%9C => Failed to connect to 14.18.117.71 port 38220: Connection refused"
露营需要做哪些准备工作
