string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%81%87%E5%88%BA%E8%BF%87%E7%9A%84%E7%BE%8E%E5%9B%BD%E6%80%BB%E7%BB%9F%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.89.159.206 port 38187: Connection refused"
遇刺过的美国总统有哪些
