Which of the following statements is correct

A． The definition phase results in the Software Requirements Specification.

B． Testing is optional in software life cycle.

C． CASE tools can only aid in the design phase of a software life cycle.

D． A change during a later phase does not require the documentation of all earlier phases to be updated.

患者男性，33岁，因左眼被弹起的木块打伤后眼痛8天来诊。PE：VosHM／30cm，眼压42mmHg，左眼混合充血（++），角膜雾状水肿，前房轴深5C．T．，房水闪辉（+），前房内可见玻璃体，瞳孔6mm×6mm，晶状体轻度混浊，眼底窥不清。

目前患者可选择的检查有（）

A.房角镜检查

B.眼底荧光血管造影

C.OCT检查了解黄斑及视网膜情况

D.B超检查了解眼后段情况

E.视野检查

F.超声生物显微镜检查了解房角、睫状体及前段脉络膜情况