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The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.? 01 Industrial Internet in the United States张居正在旁感激涕零，跪地不起，陛下为天下苍生，京城百姓，百年基业，不惜受辱，禅位与裕王，此举感天动地。听着他们娓娓述说，顾涧和刘副将军鼻头发酸，忍不住想落泪。我俩之间，像这样拖下去。更关键的是斩草要除根，只要严世藩不死，严党的旗帜就还在。某街区，五位背景各异的老太太，悠然过着各自的晚年生活。梅姨开着一家咖啡馆，儿子的去世成了她内心挥之不去的痛。而服务员小雪的出现，彻底打乱了她的生活。宋老师日日来去奔波，将自己的生活安排得满满当当，却不时给女儿带来麻烦。刘大夫初来乍到，试图对儿子的生活进行改变，令儿子苦不堪言。红姐是当地土著，虽衣食无忧，但儿女的婚事却成了她心头最大的难题。艾琳是街区里的“女神”，但内心的孤独只有她自己最清楚。五位老太太因一场“健康讲座”走到一起，在与骗子们激烈的斗智斗勇后，成为了“老闺蜜”。为了互助和助他，五位老人决定抱团养老，开起一家“老年人的乌托邦”。虽由此经历种种挫折，但最终，却用达观的姿态去笑着面对世界，并携手一起前往心中的圣地泸沽湖。