string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9F%AF%E8%BF%AA%E4%BA%9A%E5%85%8B%E7%9A%84%E4%BC%98%E7%82%B9%E5%92%8C%E7%BC%BA%E7%82%B9%E5%88%86%E6%9E%90 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
柯迪亚克的优点和缺点分析
