string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%AC%E5%85%83%E5%89%8D%E5%90%8E%E5%9C%A8%E4%B8%AD%E5%9B%BD%E7%9A%84%E5%88%92%E5%88%86 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
公元前后在中国的划分
