单选题 The physician prescribes amoxicillin suspension 100 mg every 8 hours for a child who weighs 33 lb (15 kg). The drug is supplied in a bottle labeled 250 rag/teaspoon (1mL=50 mg). How many milliliters should the nurse administer?
A. 2 mL.
B. 2.5 mL.
C. 5 mL.
D. 7.5 mL.

【正确答案】 A

【答案解析】There are 250 mg in 1 teaspoon (5 mL); therefore, 1 mL=50 mg. The child should receive 2 mL of suspension (100 mg). 250 mg/5 mL= 100 mg/x mL. x=2.