— How do you like Robie?

— He has been trying hard at his subjects.________ he is an excellent student.[ ]

A. No wonder  

B. No problem

C. No excuse  

D. No doubt

阴阳偏盛的治疗，下列哪一原则最为中肯（）

A.调整阴阳

B.补偏救弊

C.损其有余

D.热者寒之

E.寒者热之