肌肉发僵时，皮肤的供血量就会减少。
The blood supply to the skin is reduced when muscles stiffen.
利尿剂，它可以帮助肾脏排出身体里多余的水分和盐，来减少总血量。
Diuretics, or "water pills," which help the kidneys flush extra water and salt from your body and decrease blood volume.
数据显示，如果向献血的人提供一定的奖金回报时，献血量就会减少。
Data showed that when people were offered a stipend for their donation, less blood was given.
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