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索性他坏到底也不觉得亏，眼下他却觉得自己很亏。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.目的已经达到了，他可不想再继续为难自己的女儿，笑道：好了，有什么消息就说吧。下落不明其实是好消息，比见了尸首要好。板栗在训练的间隙将秦淼带到小树林，对她谆谆告诫，并不顾她身体劳累，拉着她比划。要知道越国大军之中最为厉害就是骑兵，在攻城这方面是多有不及的。此剧为网络剧《恋爱播放列表 第四季》的延伸剧，首次在电视萤幕上播出。此剧将延伸网络剧《恋爱播放列表》系列的世界观，由在玹、朴慧秀及过往已参演上一季的裴贤圣等人主演。