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徐风一边揉脖子一边大声抗议，这也算是反应。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.Disadvantages: The efficiency is a bit low, and the synchronization lock must be judged every time the instance is called.曾被陷害抄袭并遭遇众叛亲离后被强行送出国的服装设计师苏北，在时隔七年以后以金牌模特经纪人的身份华丽归国。他对西楚国的关注超过了很多人，所以有任何的风吹草动，都有人禀报给他。在剧中潘之琳饰演的简如恬，与徐正溪饰演的宋文熙有着一段多人虐恋的感情。原本一直都是桀骜不驯的宋文熙，多半是逢人作戏，直到遇上了简如恬。但是就当两人产生了情愫之后，宋天宇则是从中作梗，因为一直喜欢简如恬，企图捆绑。经过一些事情之后，宋天宇才认清自己究竟喜欢谁？最终选择和如艳浪迹天涯，私奔。