string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%89%E8%B5%84%E9%87%91%E5%81%9A%E4%BB%80%E4%B9%88%E6%8A%95%E8%B5%84%E5%A5%BD%E5%91%A2 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
有资金做什么投资好呢
