Which of the following statements about object oriented databse is not correct

A．Each object has a unique object identity in the system.

B．Encapsulation and inheritance are two important features of object oriented database.

C．A subclass can inherit the attributes and methods of all its superclasses.

D．A subclass includes the attributes and methods of all its subclasses.

患儿男，8个月，因“发热、咳嗽2d，伴气促1d”来诊。体温37.0~40.5℃。既往健康，生长发育过程无异常，按时进行预防接种。查体：T39.5℃，P170次/min，R66次/min；烦躁；颈部和躯干部可见猩红热样皮疹；鼻翼扇动，口周发绀，吸气时可见三凹征；双肺可闻中小湿性啰音；心音尚可，HR170次/min，律齐，无杂音；肝肋下1.5cm。

此时应采取的治疗措施包括（提示入院第3周，再次出现高热。CRP45mg/L，血细菌培养（－）。胸部B型超声：左侧胸腔探及4cm液性暗区，内有分隔。）（）

A.改用万古霉素抗感染

B.改用氧哌嗪青霉素抗感染

C.改用奈替米星抗感染

D.输血

E.胸膜纤维板剥离术

F.应用肾上腺皮质激素