string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8E%86%E5%8F%B2%E6%96%87%E5%8C%96%E5%90%8D%E5%9F%8E%E8%8C%83%E5%9B%B4 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
历史文化名城范围
