(单选题)29: 范先生,23岁,糖尿病史5年,自行停用胰岛素改服糖尿病中药“偏方”1周。今出现恶心、呕吐、腹痛急诊。血白细胞15.0x109/L,血糖21.5mmol/L,尿酮体阳性,血pH7.2,诊断可能为:
A: 糖尿病合并阑尾炎
B: 糖尿病并急性胃炎
C: 糖尿病酮症酸中毒
D: 糖尿病合并急性肠炎
E: 糖尿病酮症
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