He accidentally _____ he had quarreled with his wife and that he hadn’t been home for a couple of weeks.

A．let out

B．tried out

C．ran out

D．made out

发热、感染和饥饿时易引发维生素D缺乏性手足搐搦症的原因是（）

A.神经肌肉兴奋性增高

B.组织细胞分解释放磷，使血磷升高，血钙离子下降

C.血糖下降

D.脑细胞代谢异常

E.代谢性酸中毒使血钙离子下降