string(242) "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%E5%B8%82%E6%94%BF%E5%AE%9E%E5%8A%A1%E6%A1%88%E4%BE%8B => Failed to connect to 14.18.117.71 port 38133: Connection refused"
2021一建市政实务案例
