string(256) "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%E9%87%8D%E7%82%B9%E7%9F%A5%E8%AF%86%E6%95%B4%E7%90%86 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
建设法规重点知识整理
