string(285) "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%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
柯迪亚克的优点和缺点是什么
