[单选题]最早提出制方理论的医书是( )
A.《伤寒论》
B.《黄帝内经》
C.《肘后备急方》
D.《圣济总录》
E.《医方集解》

With the improvement of people's living standards and the increase in consumption level, the garbage problem in China becomes increasingly urgent. Many cities are surrounded by garbage. Confronted with the growing garbage output and deteriorating environment, the Chinese government is implementing the policy of garbage classification with great effort. Garbage classification means dividing garbage into recyclable and unrecyclable, and requires people to put garbage into different trash cans so that it can become new resources through different ways of cleaning, transporting and recycling. It can reduce not only the amount of garbage that needs to be disposed of, but also the deposing cost and the usage of the land, benefiting our society, economy, and environment.