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女性,55岁,高血压20年,不规律服药,某日晨起突发头痛,意识不清,30分钟后送到医院。体检:昏迷,血压210/120mmHg,双眼向右侧凝视,左足外旋位。哪项辅助检查对明确诊断最有价值()
A . A.腰穿检查
B . 脑电图检查
C . 脑超声检查
D . 头颅CT检查
E . 开颅探查
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