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阅读七选五
解密10段中设空
分层练综合能力突破
一、
(2023·江苏·统考模拟预测)Whether it is the flu or any of the other cold-like viruses rising in winter, it seems that stuffy noses and sore throats are common symptoms. You may have noticed, however, that your cold seems to get better or worse depending on the time of day. 1 Then, they partially clear up throughout the day, only to get worse once more as you get to bed. Why does this happen?
Currently, the leading idea is that symptom severity is linked to our circadian rhythm (昼夜节律). The circadian rhythm is very important for daily cellular processes and can be affected by the amount of sleep and light we get each day. 2
While resting, the body uses the downtime to recover. 3 This also applies when you are ill—the body floods the blood with white blood cells called leukocytes, resulting in and immune response against diseases and the immune system fighting infection.
This, therefore, explains why our cold symptoms get worse as we settle down for a night’s sleep. Cells infected by viruses are attracted to the local area and killed, causing soreness in the affected tissues, and mucus (鼻涕) floods the nose to join the fight. 4 You wake up feeling like death due to the battle happening within.
5 The first is simply gravity. When you lie down, your mucus builds up in the nose, causing pressure and headaches. As you stand up, you start to feel better. Another factor is about hormones. Hormonal imbalances can be caused by lack of sleep at night and could influence immune function, leading to a cycle of sleepless nights and then feeling worse.
A.Others are reporting the same thing.
B.It’s a good thing, but it really doesn’t feel like it.
C.Gravity helps out a lot more when you are upright.
D.Most commonly, you wake up with worse symptoms.
E.There are other reasons why you might feel worse at night.
F.This is why sleep is so important after you’ve been to the gym.
G.It also plays a critical role in controlling th