女，69岁。年老体弱，患肺炎2周余。虽经4天抗感染及一般对症治疗，但病情仍未见明显好转。为防止病情恶化，应特别注意观察-查字典考试网

女，69岁。年老体弱，患肺炎2周余。虽经4天抗感染及一般对症治疗，但病情仍未见明显好转。为防止病情恶化，应特别注意观察

A、心率变化
B、血压变化
C、有无呼吸困难
D、神志变化
E、血白细胞变化

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