专家建议： 一天之中，有两个时间段最适合晒太阳
一个是上午6时到10时，此时红外线占上风，紫外线偏低，使人感到温暖柔和，可以起到活血化瘀的功效；
第二个时段是下午4时到5时，此时正值紫外线中的a光束占上风，可以促进肠道内钙、磷的吸收，有利于增强体质，促进骨骼正常钙化。
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