–What’s the matter, doctor?Nothing serious. Take the medicine according to the .A. int

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A. introductions
B. explanations
C. suggestions
(答案→)D. directions
解析：考查名词辨析：A. introductions介绍B. explanations解释C. suggestions建议D. directions说明书，句意：--怎么了，医生？--没什么严重的，按照说明书吃药就行。选D。