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Avoid coupling the sender and receiver of the request, make it possible for multiple objects to receive the request, connect these objects into a chain, and pass the request along this chain until an object processes it. This is the responsibility chain mode. In the responsibility chain mode, it is possible for each object to process the request, thus realizing decoupling between the sender and receiver of the request. At the same time, the responsibility chain mode simplifies the structure of the object, which makes each object only need to refer to its successor without knowing the whole chain, thus improving the flexibility of the system and making it more convenient to add new request processing classes. However, we cannot guarantee that all requests can be processed in the responsibility chain, and it is not conducive to observing runtime characteristics.根据纵横文学作家墨春花同名小说改编，讲述了定庄集团的掌权人——顾灵色，与未来集团的傀儡总裁——叶承枢，决定协议订婚99天。在顾灵色追求者权子墨阴差阳错的助攻下，叶承枢与顾灵色一吻定情，两人感情迅速增温。然而因为商业利益两人的关系变得扑朔迷离，一场阴谋悄然而生……The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.主要讲述了寻找属于自己的幸福的95年生小姐的波澜万丈故事。Practical purposes: College students' popular science activities in rural areas, go deep into the countryside to carry out investigation activities such as environmental sanitation status investigation, villagers' attitude investigation towards the new rural cooperative medical system, popular science knowledge investigation, etc., to publicize scientific planting knowledge and improve environmental protection awareness. At the same time, let college students really go out of the school gate, contact with the society, understand the national conditions, increase their knowledge and get exercise in practice, put the knowledge learned in the school into practice, increase social experience, so as to better participate in public health work in the future.5.9. 3 Closed craniocerebral trauma lost consciousness for less than 30 minutes without skull fracture. Individual evaluation was made after 6 months of ground observation.