脸色成菜色主要是beta-carotene 过多引起的。以前贫困地区以地瓜为主食的民众,健康状况普遍不行。
脸色成菜色主要是beta-carotene 过多引起的。以前贫困地区以地瓜为主食的民众,健康状况普遍不行。
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