Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise; that sudden rush of blood is what causes the headache.

头部的血管收紧以阻止身体热量的流失，然后放松让血液流动起来，血液的突然涌入是引起头痛的原因。

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Doctor used to let blood from people to lessen a fever.

过去医生以放血来降低轻热度。

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Doctors used to let blood from people to lessen a fever.

过去医生以放血来减轻热度。

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Hopefully it's not a Snicker's bar but let's assume it is a Snicker's bar and your blood glucose is going to rise because you're taking a lot of sugar in.

但愿不是士力架,但假设你们吃了士力架,你们的血糖水平会升高,因为你们摄入了许多糖分

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The reason it typically takes two days to conduct a blood test and it can take as long as five is that once a nurse takes a blood sample, it must be sent to a central lab where the blood is cultured or amplified in order to let any infections grow and then cleaned.

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