string(276) "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%E6%80%BB%E7%BB%9F%E9%81%87%E5%88%BA%E5%90%8E%E7%9A%84%E5%BA%94%E6%80%A5%E6%9C%BA%E5%88%B6 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
美国总统遇刺后的应急机制
