string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E4%B8%8A%E5%8F%AF%E4%BB%A5%E9%80%9A%E8%BF%87%E4%BB%80%E4%B9%88%E8%B5%9A%E9%92%B1%E5%91%A2 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
网上可以通过什么赚钱呢
