参考阅读:
http://blog.wenxuecity.com/blogview.php?date=201004&postID=35891
http://blog.wenxuecity.com/blogview.php?date=201005&postID=732
http://blog.wenxuecity.com/blogview.php?date=201006&postID=21626
http://blog.wenxuecity.com/blogview.php?date=201007&postID=6324
http://blog.wenxuecity.com/blogview.php?date=201007&postID=141
http://blog.wenxuecity.com/blogview.php?date=201004&postID=35891
http://blog.wenxuecity.com/blogview.php?date=201005&postID=732
http://blog.wenxuecity.com/blogview.php?date=201006&postID=21626
http://blog.wenxuecity.com/blogview.php?date=201007&postID=6324
http://blog.wenxuecity.com/blogview.php?date=201007&postID=141