血淋与尿血的鉴别，最主要的是 （）

A.尿频

B.尿热

C.尿淋沥不尽

D.尿痛

E.血色深浅

She is popular among her classmates, ________________ she can be annoying at times.

A．in case

B．as if

C．even if

D．so that