---Could you tell me ________?       

---Yes. They ________ to the museum.

A．where the girls are; have gone

B．where were the girls; have been

C．where are the girls; have gone

D．where the girls were; have been

患儿，4岁，曾患佝偻病。查体见：鸡胸、严重的"X"形腿。该患儿的治疗原则是（）。

A.多晒太阳

B.多作户外活动

C.给予预防量维生素D

D.给予治疗量维生素D

E.可考虑矫形手术治疗