China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing

boats from ________ in the South China Sea.[ ]

A. attacking  

B. having attacked

C. being attacked  

D. having been attacked

治疗急性胰腺炎（水肿型）的主要治疗措施是（）。

A.手术

B.抑制或减少胰液的分泌

C.给予肾上腺皮质激素

D.给予抗生素

E.给予吗啡镇痛