这里有几个帖子，读读跟贴，你会知道大部分人的意见

http://web.wenxuecity.com/BBSView.php?SubID=pet&MsgID=225814

http://web.wenxuecity.com/BBSView.php?SubID=pet&MsgID=212182

http://web.wenxuecity.com/BBSView.php?SubID=pet&MsgID=218752

http://web.wenxuecity.com/BBSView.php?SubID=pet&MsgID=197451

http://web.wenxuecity.com/BBSView.php?SubID=pet&MsgID=185480

http://web.wenxuecity.com/BBSView.php?SubID=pet&MsgID=147482