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2002年11月，“非典型”肺炎在中国广州爆发，迅即蔓延到全世界，2003年3月，SARS病毒登陆新加坡，随即而来的是恐慌、猜疑、逃避、学校停课、果菜中心关闭，市面一片萧条，政府成立了抗炎作战部队……本剧将把这场战役通过戏剧手法，生动呈献给观众，并借此表扬站在抗炎最前线的医疗队伍。肺部肿瘤专科医生关斯嘉医术高明，长得漂亮有气质，追求者众，她却都不为所动。原来她有过一段刻骨铭心的爱情。男朋友汤心洋也是个医生，一次意外死在异乡，她从此寄情工作，把对男朋友的思念与爱深埋在心底。斯嘉表面上虽然平静，心中的悲伤还是不减，除了照顾心洋母亲及患有自闭症的弟弟心海外，就全情投入医务工作I waited quietly for a while. Zhao Mingkai recalled it and organized the language. Only then did he open his mouth and said:记得他扛着她逃跑时，迷糊间感觉他每次放下她都是小心翼翼的，并不曾粗暴地往地上丢。哼，他能掀起什么风浪。又是此番救援赵国的统兵主帅，真正意义上统领几乎所有的楚军兵力，宋某人如何能不得瑟。In TCP protocol, messages arriving at the destination will enter the buffer of the TCP stack and will not be forwarded to the receiving system until the buffer is full. This is to minimize the number of times the system empties the buffer. However, the sender can force the receiving system to clear the contents of the buffer by sending a TCP message with a PSH flag of 1. The TCP PUSH + ACK attack, like the TCP SYN attack, aims to deplete the resources of the victim system. When an attacker sends TCP messages with PSH and ACK flags set to 1 to the Target host, these messages will cause the Target system to clear all TCP buffers (whether the buffers are full or not) and respond with an acknowledgement message. If this process is performed by a large number of controlled hosts, the system will not be able to process normal data, resulting in denial of service.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.