DOM is a platform- and language-(1)API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently,definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented(2).DOM is a (3) -based API to documents, which requires the whole document to be represented in (4)while processing it.A simpler alternative to DOM is the event-based SAX, which can be used to process very large (5) documents that do not fit into the memory available for processing.

空白（3）处应选择（）

A.table

B.tree

C.control

D.event

患者女性，45岁，既往有糖尿病病史，口服降糖药物，血糖控制尚理想。近一周来因发热出现食欲下降、乏力，2小时前家属发现其意识不清送急诊，下列哪项辅助检查应优先考虑（）。

A.头部CT

B.快速血糖

C.脑脊液常规、生化

D.脑血管造影

E.头颅MRI