— I’ve shown you all the interesting and important places of our school.

— Thank you for          so much time.[ ]

A. taking

B. spending

C. costing

D. having

下列哪项不是引起低容量性低钠血症的原因？（）

A.长期持续使用速尿或利尿酸

B..肾上腺皮质功能亢进

C.慢性间质性肾疾患

D.消化道失液（呕吐，腹泻）