System analysis is traditionally done top-down using structured analysis based on (1) ．Object-oriented analysis focuses on creation of models．The three types of the analysis model are (2) ．There are two substages of object-oriented analysis． (3) focuses on real-world things whose semantics the application captures．The object constructed in the requirement analysis shows the (4) of the real-world system and organizes it into workable pieces． (5) addresses the computer aspects ofthe application that are visible to users．The objects are those which can be expected to vary from time to time quite rapidly．

1（）

A．functional decomposition

B．object abstraction

C．data inheritance

D．information generalization

男性，10个月。左腹股沟可复性包块1月。临床诊断左腹股沟斜疝。目前的处理宜采取（）

A.限期手术

B.暂不手术

C.急诊手术

D.择期手术

E.及早手术