string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BE%8E%E5%9B%BD%E9%83%BD%E6%9C%89%E5%93%AA%E4%BA%9B%E6%80%BB%E7%BB%9F%E8%A2%AB%E5%88%BA%E6%9D%80 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
美国都有哪些总统被刺杀
