string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E8%B4%A2%E7%AE%A1%E9%9A%BE%E5%BA%A6%E7%B3%BB%E6%95%B0 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
注会财管难度系数
