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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.Qq: 3365413694, V-letter: xjs776 hong kong citizen no.: Xia kwan shan忠孝节义四个单元主题，分别为：忠─万古留芳；孝─孝感动天；节─断机教子；义─路遥知马力。Declare business objects and log slices in xml files:刚刚摆脱了“不成熟”帽子的邓家齐（杜淳饰演）还没学会如何当丈夫，一下做了父亲，妻子贺飞儿（马伊琍饰演）为他生下一个儿子。此时，挑剔的老妈张彤迈入了更年期、而一贯贤惠懂事的贺飞儿，在生完孩子后陷入产后抑郁症。邓家齐既要面对更年期老妈的挑剔，又要安抚抑郁症的媳妇，简直成了家庭救火员。苗知喻准备与王心颖结婚买房，却遭遇80后子女都会面临的棘手问题，两个孩子，四个老人！苗知喻和王心颖左右为难，开始受起夹板气。自己开店的蒋鹏飞，认为自己有能力赚钱养家了，不知道已经预谋了多长时间，说不定早就有什么行动了，只是自己不知道罢了。