应该由用户来参数化程序，而不是其创建者。
孔子说：“君子通晓道义，小人通晓私利。”
有一天我读了一本书，我的整个生活都改变了。
No one can become fully aware of the very essence of another human being unless he loves him.
The secret of all effective advertising is not the creation of new and tricky words and pictures, but one of putting familiar words and pictures into new relationships.
In programming, everything we do is a special case of something more general -- and often we know it too quickly.