並前往https://www.plkhsn.edu.hk/student/cs_activity/in/2004-2005/%E7%90%86%E6%83%B3%E8%81%B7%E6%A5%AD%E6%AF%94%E8%B3%BD/6c%E6%9D%8E%E5%85%86%E9%BA%9F.ppt
