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就天启那水准，还是去拜紫月剑为师，多学学吧。The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From BaiduGiven dataset:地球上所有具有Y染色体的哺乳动物突然同时死亡，幸存下来的只有一个叫尤里克·布朗的男人......富家子弟陈享自幼好武，苦无名师指点，其母遂指点其去广州找表叔李有山拜其为师，陈享在广州救下了坠马的富商千金郑安妮，安妮对其留下深刻印象。 　　在奕康老爷的寿宴上，享与安妮重逢，并见到了广州著名的艺妓徐小玄，享和奕康之子奕真对其惊为天人，一见钟情，而小玄却对奕真情有独钟。 　　享拜李有山为师。一日无意中发现小玄和蔡福的师徒关系。李有山偶遇蔡福，两人意气相投，结为生死之交。蔡福告诉小玄其生世，原来蔡福与奕康同是少林弟子，奕康贪图富贵，勾结朝廷火烧少林，少林全寺僧人遭难，只有蔡福侥幸逃脱，小玄之父为朝中大官，仗义执言，为少林辩护，但被奕康污蔑勾结少林，结果皇上下旨徐家男子处死，女子卖到青楼。小玄听后悲愤至极，发誓报仇……　　村民们对于名人的到来欣喜若狂。有些人认定丹尼尔笔下的人物就是他们自己，对这位作家发出各种请求。根据安...况且这考较本是为了热闹，不是真的要难为他，不如来个俗题目。