阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

Mary is a thirteen-year-old girl, she had a bad cold yesterday. She didn't want to eat anything, her mother took her to see the doctor. The doctor gave her a bottle of medicine and told her to take it as the instruction(说明) said.

Cold Medicine
Shake it before taking.
Take it three times a day after meals.
Dose(剂量) for each time:
Age	Over 14	2 teaspoons
	8—14	1 teaspoon
	4—7	1/2 teaspoon
Keep it in a cold place. Take it before December 31, 2023