string(267) "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%E6%98%AF%E4%B8%AD%E5%9B%BD%E7%9A%84%E4%BB%80%E4%B9%88%E6%97%B6%E6%9C%9F => Failed to connect to 101.89.117.144 port 38022: Connection refused"
公元前是中国的什么时期
