-- Why don't you try to do exercise to lose weight?

-- I have tried everything but it has made little _____.[ ]

A. use

B. result

C. conclusion

D. difference

中药片剂的缺点是（）

A.剂量不准确

B.儿童及昏迷患者不易吞服

C.含挥发性成分的片剂储存较久含量可能下降

D.生产自动化程度不高

E.生物利用度比胶囊剂、散剂差