string(333) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=idc%E4%B8%AD%E5%9B%BD%E5%AE%98%E7%BD%91%E7%9A%84%E6%8A%A5%E5%91%8A%E5%9C%A8%E8%AE%BA%E6%96%87%E4%B8%AD%E6%80%8E%E4%B9%88%E5%86%99%E5%8F%82%E8%80%83%E6%96%87%E7%8C%AE => Failed to connect to 101.89.159.206 port 38100: Connection refused"
idc中国官网的报告在论文中怎么写参考文献
