string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%89%A7%E9%A9%AC%E4%BA%BA%E7%BC%BA%E7%82%B9%E5%92%8C%E4%BC%98%E7%82%B9%E5%88%86%E6%9E%90 => Failed to connect to 218.78.59.96 port 38043: Connection refused"
牧马人缺点和优点分析
