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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 Baidu这……差役更加尴尬，师爷已经辞工了。由《神的病历簿》的深川荣洋担任导演的这部作品，是以“与疾病共存”为主题的人性剧。主人公是在急救现场工作的医生·红野真空。在东京的一家大医院，真空怀抱着梦想和自豪感面对着工作，但某天却发现自己患有某种疾病。没有钱想继续工作的她，偶然知道了在深山里的小村庄的诊疗所，隐藏病工作。乘坐可疑的巴士，穿过森林，在好不容易到达的虹之村等待她的是同样从东京来的外科医生和护士的男人2人。和他们共同生活的真空，在虹之村诊疗所开始了新生活。讲述的是一对刚刚毕业的情侣，参加实习工作碰到精神分裂的老板，专虐待女生，李馨和抛弃他的前女友长的一模一样，赵财海把公司所有的人带到偏僻的别墅里进行虐待，周辉和李馨用智慧对付并杀死了这个变态。· Increased sweating;In fact, what hurts children most is not divorce, but parents' sleepless fights, quarrels, cold wars and estrangement from each other all day long.I. Classification of Design Patterns