下列关于急性肺泡性肺水肿的描述，错误的是（）

A.早期小结节状影，迅速融合呈大片状

B.肺门旁蝶形浓密影

C.胸腔积液

D.由中、下肺内带向上肺及外带发展

E.经有效治疗，病变可于数周后完全消散

The employees were asked to concentrate their attention________improving the quality of the products.[      ]

A. in  

B. to    

C. with  

D. on