string(257) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BB%BA%E8%AE%BE%E6%B3%95%E8%A7%84%E8%AE%BA%E6%96%87%E5%8F%82%E8%80%83%E6%96%87%E7%8C%AE => Failed to connect to 101.91.112.32 port 38162: Connection refused"
建设法规论文参考文献
