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晚清年间的浙江余杭县仓前镇……一日，年轻貌美的小白菜在一家酒楼巧遇帮人写诉状的杨乃武，杨乃武顿为小白菜的美貌吸引，而小白菜又正好租下了杨乃武家的房子。杨乃武怜惜小白菜的身世，让她帮忙整理新书房和做些杂活，以贴补家用。二人朝夕相处，小白菜从此迷上了杨乃武的多才潇洒。这事被丫鬟葛三姑察觉，二人将葛三姑哄住，葛三姑答应守密。小白菜要托付终身，杨乃武许诺等他中举，就帮小白菜与葛小大解除婚约，自己休掉杨詹氏，然后娶她为妻。二人互换信物。小白菜满心欢喜，日夜憧憬，但想到就要与自己的未婚夫葛小大圆房，不免忐忑。清朝雍正年间，朝近为阻绝据台抗抗清的明将郑成功，强制禁海，强制沿海百姓向内陆迁移叁十华里，从此人民离开了世代耕种的故土，背井离乡…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殿内，皇帝咳嗽一声，打断郑长河的感叹，心道难道你后悔了？那可不成。郑氏失笑道：最喜欢的？你表叔家的两个闺女……话未说完，板栗就抱怨道：娘，你一年都不见她们一回，都不晓得她们是啥性子，哪有最喜欢了？娘你就是故意这么说。A cut wireHaving said so much, summarize the application scenarios of the three adapter modes: