患儿，男，5岁，14kg，出生后即发现口唇发绀，生长发育较同龄人迟缓。好蹲踞，时常感冒。拟诊先天性心脏病收住院。患儿心脏听诊胸骨第二、三、四肋间可闻及收缩期杂音。胸前可扪及震颤。心脏彩超提示法洛四联症。

提示：患儿经处理后血液动力学渐趋稳定，手术顺利结束，带气管插管控制呼吸转入ICU病房继续监测治疗，患儿清醒后发现左侧肢体偏瘫，CT检查发现右大脑皮层气体栓塞。提问：从麻醉角度下列哪些环节易导致气栓？（）

A.中心静脉穿刺置管

B.气管插管

C.桡动脉测压装置冲洗

D.IPPV通气

E.术后复温

F.胃肠减压

DOM is a platform-and language- (71) API that allows programs and scripts todynamically access and update the content． structure and style of WWW documents(currently，definitions for HTML and XML documents are part ofthe specification)．Thedocument can be further processed and the results of that processing can be incorporated backinto the presented (72) ．DOM is a (73) -based API to documents，which requires the wholedocument to be represented in (74) while processing it．A simpler altemative to DOM is the event—based SAX，which can be used to process very large (75) documents that do not fitinfo the memory available for processing．

A．XML
B．HTML
C．script
D．web