string(239) "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%E4%BA%A7%E5%B9%B3%E5%9D%87%E5%8D%A0%E7%94%A8 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
流动资产平均占用
