string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%A3%8E%E6%8A%95%E6%8E%92%E5%90%8D%E5%89%8D%E5%8D%81%E7%9A%84%E5%85%AC%E5%8F%B8 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
风投排名前十的公司
