系统方法应用于公共政策领域所遵循的原则包括（）。
A.整体性
B.综合性
C.最优化
D.可行性
参考答案：A, B, C, D
Kate didn't go to the movie last night because she had to ______ her sick dog at home. [ ]
A. look at
B. look up
C. look for
D. look after
A．To help the students appreciate the arts.
B．To make the students’ education more well-rounded.
C．To investigate the impact of arts training.
D．To enhance the students’ math skills.
