string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%93%B6%E8%A1%8C%E7%9A%84%E5%88%A9%E7%8E%87%E8%AE%A1%E7%AE%97 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
银行的利率计算
