As the final exam is just around the corner,  all the students are           in reviewing the lessons carefully.  [ ]

A. occupied  

B. practising  

C. busying    

D. devoted

提示急性胰腺炎患者预后不良的生化改变是（）

A.高胆红素血症

B.高三酰甘油血症

C.低钙血症

D.高血糖

E.低血糖