In some foreign countries, such as Canada, children usually leave

their parents when they grow up. It makes the old feel ______. [ ]

A. alone

B. lonely

C. frightened

D. enjoyable

增加化合物的亲脂性（）

A.不能改善药物的体内吸收

B.不利于通过血脑屏障

C.不增强作用于中枢神经的药物活性

D.不能使药物在体内容易分解

E.不能使药物易于穿透生物膜