单选题 A client's blood glucose level is 45 mg/dL. The nurse should be alert for which signs and symptoms ？（）

A、 Coma, anxiety, confusion, headache, and cool, moist skin.
B、 Kussmaul's respirations, dry skin, hypotension, and bradycardia.
C、 Polyuria, polydipsia, hypotension, and hypernatremia.
D、 Polyuria, polydipsia, polyphagia, and weight loss.

【正确答案】 A

【答案解析】Signs and symptoms of hypoglycemia include anxiety, restlessness, headache, irritability, confusion, diaphoresis, cool skin, tremors, coma, and seizures. Kussmaul's respirations, dry skin, hypotension, and bradycardia are signs of diabetic ketoacidosis. Excessive thirst, hunger, hypotension, and hypernatremia are symptoms of diabetes insipidus. Polyuria, polydipsia, polyphagia, and weight loss are classic signs and symptoms of diabetes mellitus.