string(324) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BB%80%E4%B9%88%E7%9F%AD%E6%9C%9F%E6%8A%95%E8%B5%84%E6%AF%94%E8%BE%83%E5%A5%BD%2C%E5%81%9A%E7%82%B9%E4%BB%80%E4%B9%88%E6%8A%95%E8%B5%84%E5%A5%BD%E5%91%A2 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
什么短期投资比较好,做点什么投资好呢
