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(2) Market segmentation: In the "era of concentration", product spokesmen should also be detailed and spokesmen should be subdivided. Including the breakdown of gender, age, personality, nationality, etc. Different regions have different concepts, consumption patterns, consumption concepts, economic and cultural backgrounds and aesthetic methods. Stars have different influence in different regions.　　农村出身的拉丁舞老师余梦辉（张敬轩 饰）在被要求比赛三连冠的压力下，以严苛的方式训练少儿舞蹈队，但比赛却以失败告终余梦辉还被家长揍了一顿。心灰意冷的他回到乡下父亲（林雪 饰）的菠萝园，怎料小队员们追来，在舞厅老板蓝姨（郝蕾 饰）的说动和小朋友的努力下，余梦辉重整旗鼓，他决定带着小朋友们重回舞台，却错过了第二场比赛，同时一场真人秀比赛向他们发出了邀请，等待他们的将会是什么？Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.　　《恋爱SOS》第二季仍然是在四个人的鬼马生活中之间展开的，既有当下最热门的婚恋话题，又将焦点直接对准网络受众—— 宅男宅女们的生活。那个秋霜，当年我们就派人去问过她，她并没有说你说的那些话。