______ is in the classroom. In fact many students were late for school ________me because of the

heavy rain.   [ ]

A. No students; except                    

B. Not every student; besides   

C. Not all the students; but                

D. No every student; except

患者男，29岁。慢性腹泻5年，大便3～5次／日，近日劳累后病情加重，大便7～9次／日，呈黏液脓血便，伴发热39℃及腹痛，已应用柳氮磺吡啶治疗，症状缓解不明显。应给予的进一步治疗是（）

A.环磷酰胺

B.甲硝唑

C.洛赛克

D.环孢素A

E.泼尼松