---Someone is knocking at the door. Who may it be?

---It ______ be Tom. He is still in the school.

A．can’t

B．mustn’t

C．couldn’t

D．may not

患儿，3岁。发热骤起，头痛畏寒，肌肤无汗，咽喉红肿疼痛，影响吞咽，皮肤潮红，痧疹隐隐，舌质偏红，舌苔薄黄，脉浮有力。其治法是（）

A.辛凉宣透，清热利咽

B.清热解毒，化痰利咽

C.燥湿化痰，清喉利咽

D.化痰开窍，清喉利咽

E.润肺化痰，清喉利咽