Time: The Stone Age Place: China Character: Our Ancestor Event: Our Ancestor discovers that by inserting a sharp rock sliver into a bumped area, the skin is punctured, pus and blood flow out, and the pain is diminished.
時間：石器時代地點：中國人物：老祖宗事件：在偶然的情況下，老祖宗發現用尖銳的石塊刺撞傷處，使皮膚破裂、流出膿血，可以減輕痛苦。