string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%89%E4%BB%80%E4%B9%88%E6%8A%95%E8%B5%84%E5%B0%8F%E7%9A%84%E9%A1%B9%E7%9B%AE%E5%8F%AF%E4%BB%A5%E5%81%9A => Failed to connect to 14.18.117.71 port 38041: Connection refused"
有什么投资小的项目可以做
