string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%A9%E6%B4%A5%E8%B4%A2%E7%BB%8F%E5%A4%A7%E5%AD%A6%E7%A0%94%E7%A9%B6%E7%94%9F%E9%99%A2%E7%BD%91%E4%B8%8A%E7%A1%AE%E8%AE%A4 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
天津财经大学研究生院网上确认
