string(271) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E5%BB%BA%E6%B3%95%E8%A7%84%E7%AD%94%E6%A1%88%E8%A7%A3%E6%9E%90%E5%AE%8C%E6%95%B4%E7%89%88 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
2021一建法规答案解析完整版
