Nuclear ______ be really dangerous at times even though it is a nice energy in general.

[ ]

A. shall

B. should

C. can

D. must

男性，21岁，因腰背部僵硬一月，经检查诊断为“强直性脊柱炎”。有磺胺过敏史。该患者选择最佳治疗药物是（）

A.雷公藤

B.硫氮磺胺吡啶

C.甲氨蝶呤

D.环磷酰胺

E.以上均可以