There are some dangerous fish in the river, and I've warned Jack _____ here. [ ]

A. not to swim

B. to not swim

C. swim not to

D. to swim not to

女，65岁，突起胸骨后剧烈疼痛，持续8小时急诊入院。有糖尿病病史和高血压病史。心电图示Ⅱ、Ⅲ、aVF导联ST段弓背向上抬高0.3mV，病人突然意识丧失，抽搐。心电图示房室分离，心房率72次/分、心室率46次/分，QRS宽度>0.12s。

病人突然意识丧失的原因为()

A．脑出血

B．心源性脑缺血综合征

C．低血糖昏迷

D．高血压脑病

E．酮症酸中毒