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天气冷，万一娃儿掉水里可不好。In real life, China's income tax is divided into enterprise income tax, foreign-invested enterprises or foreign-invested enterprises income tax and personal income tax. For these three types of income tax, each is calculated in a different way. Personal income tax has a personal income tax calculation method, while enterprise income tax has its corresponding calculation method. If we do not adopt the policy mode to realize such a requirement, we will define an income tax class, which has an attribute to identify the type of income tax and a CalculateTax () method to calculate the tax. In this method, we need to judge the tax type and calculate the income tax for different tax types through if-else statements. Such an implementation can indeed solve this scenario, but such a design is not conducive to expansion. If the system needs to add an income tax in the later period, it has to go back and modify the CalculateTax method to add an additional judgment statement, which clearly violates the principle of "open-closed". At this time, we can consider using the strategic mode to solve this problem. Since the tax method is the changing part of this scenario, we can naturally think of abstracting the tax method at this time, which is also the essence of the implementation of the strategic mode.90后沪漂刘茵（蓝盈莹 饰）与上海男人石磊（牛骏峰 饰）走入婚姻，却意外发现婆婆（邬君梅 饰）作为彩礼送她的价值连城的翡翠玉镯“由真变假”，进而引发一场家庭信任大战。随着秘密的揭晓，围绕两个年代，三组女性的故事徐徐展开……夏天伊始，布丽·奇特在芝加哥一个富裕郊区找到了一份工作，给六岁的弗朗西斯当保姆。但与此同时，她却放弃了自己做母亲的权利去做了手术。由于没有时间恢复，她一方面与弗朗西斯产生了许多冲突，另一方面又因与弗朗西斯母亲日益紧张的关系而焦头烂额。随着时间的推移，她们开始建立友情，并从中得到欢乐。Restaurant.pyIn fact, there are two types: parallel hairstyle mode and thread pool mode. Use a picture to describe the whole:白果你是想上去玩儿吧？白果道：瞧婶子说的，我就那么贪玩？我是担心姑娘。