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(2) It is difficult for migrant workers to work;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.Scarcity mentality will seriously affect cognitive judgment ability, and a sharp decline in cognitive judgment ability will lead to shortsightedness. In other words, a person will become stupid if he is poor.然而此时此刻，刘邦正处在无比的得意中，早已将这遭事情抛到了九霄云外。他才回家找了张槐和郑氏，才说了个开头，小葱就带着两儿子回娘家来了——她也是从街上得到了消息，立即就赶了过来。是啊。