Take a nap. Nap: ~ Time, please don't talk.
Pinyin is the foundation of primary school literacy and writing, which needs to be mastered well. Pinyin is divided into initials and finals, which need to be memorized.
The initials are B, P, M, F, D, T, N, L, G, K, H, J, Q, X, zh, ch, sh, R, Z, C, S.
The vowels are a, o, e, I, u, v, ai, ei, ui, ao, ou, iu, ie, ve, er, an, en, in, un, vn, ang, eng, ing, ong.
The benefits of a nap
It is the habit of many people to take a nap after lunch. Office workers "replenish energy" for afternoon work, while retirees recharge their batteries. A few days ago, a study showed that taking a nap for half an hour before meals can effectively eliminate fatigue and greatly improve the efficiency of work and study in the afternoon. In this regard, scientists suggest that it is best to take a nap before meals instead of taking a nap in advance.
"There is some truth in this statement, but don't copy it mechanically."
Professor Fan Dongsheng, head of the Sleep Center of Peking University Third Hospital, told the reporter. Why does someone get dizzy after a nap?
This is because after eating, blood flows to the gastrointestinal tract, resulting in a relative decrease in blood flow to the brain and limbs. The brain and limbs can't get enough oxygen and nutrition, and metabolites such as lactic acid can't be discharged in time. When you wake up, you will feel dizzy, weak limbs and general weakness. There is a folk saying that "sleep after eating, and the intestines are back."
Office workers, in particular, often take a nap at their desks, oppressing their chests, affecting their breathing, aggravating the degree of cerebral hypoxia, and causing physiological temporary "cerebral anemia." The brain and gastrointestinal tract "compete" for blood at the same time, often taking care of one thing and losing the other, resulting in the digestive system and nervous system unable to work with all their strength.
According to the research of German scholars, when taking a nap after a meal, the subcutaneous capillaries dilate, the blood flow increases, and the blood rushes to the digestive organs to compete with the brain for blood, which is in danger of inducing cerebral embolism. Therefore, people who weigh more than 20% of the standard weight, people with extremely low blood pressure, people with serious obstacles in the blood circulation system, especially those who are often dizzy due to cerebrovascular diseases, should try to avoid taking a nap after meals.