My uncle's house in the downtown area is much smaller than ours, but it is twice _____ expensive. [ ]

A. as

B. so

C. too

D. very

上述佐制药涵义的表述，正确的是

A．针对主病或主证起主要治疗作用
B．针对重要的兼病或兼证起主要治疗作用
C．针对次要兼证起直接治疗作用
D．消减或制约君；臣药的毒性和峻烈之性
E．防止病重邪甚时药病格拒