— May I take this magazine out of the reading room? 

—           . Please read it here. [ ]

A. Certainly

B. No, you needn't

C. No, you can't

D. No, you may not

下列哪项因素与肾盂肾炎发病无关

A．妊娠

B．结肠炎

C．便秘

D．尿中有盐类结晶

E．长期使用糖皮质激素