string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B5%81%E5%8A%A8%E8%B5%84%E9%87%91%E5%B9%B3%E5%9D%87%E5%8D%A0%E7%94%A8%E9%A2%9D%E6%80%8E%E4%B9%88%E7%AE%97 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
流动资金平均占用额怎么算
