string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2023%E4%B8%80%E5%BB%BA%E5%BB%BA%E7%AD%91%E5%AE%9E%E5%8A%A1%E9%9A%BE%E5%BA%A6 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
2023一建建筑实务难度
