What you smell as you sleep may influence your dreams. Smell the flowers before you go to sleep ________ you may just end up with rosier dreams.

A．and

B．/

C．or

D．but

颈部淋巴结肿大的原因有（）

A.炎症

B.结核

C.淋巴转移瘤

D.淋巴瘤

E.结节病