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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.Article 32 [Lease and Lend] Insured persons and medical assistance objects lease (lend) their valid medical insurance certificates to others or designated medical institutions to defraud medical insurance funds. The medical security administrative department shall recover the medical security fund, suspend its online settlement treatment for no more than 12 months, and impose a fine of not less than two times but not more than five times depending on the seriousness of the case.Since June 1999, an investment of 170 million yuan has taken more than two years to build the West Lake Park, which consists of three famous bridges, three water areas and four islands. The West Lake covers an area of 100 hectares, including 82.28 hectares of water, 1.72 hectares of square roads, 16 hectares of greening and more than 200 kinds of tree species.This is how the poor fall into the vicious circle of poverty: