下列有关伤寒治疗错误的是（）

A.无渣软食

B.慎用退热药

C.腹胀者禁用新斯的明

D.便秘者可用泻药

E.一般病例不用糖皮质激素

You are underway and pass by a lighthouse. Its light，which was white since you first sighted it，changes to red. This means（）.

A.the light is characterized as alternately flashing

B.the lighthouse has lost power and has switched to emergency lighting

C.it is the identifying light characteristic of the lighthouse

D.you have entered an area of shoal water or other hazard