string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%8E%E4%B8%96%E9%9A%94%E7%BB%9D%E7%9A%84%E5%9B%BD%E5%AE%B6%E6%9C%89%E5%87%A0%E4%B8%AA => Failed to connect to 101.89.117.144 port 38056: Connection refused"
与世隔绝的国家有几个
