英语作文100字左右

Long-term stay up all night without sleep five harm: harm one: decreased immunity, often in late at night, fatigue, lack of energy conditions, the body's immune system will fall, colds, gastrointestinal infections, allergies and other symptoms of autonomic nervous system disorders will not And to find you on the head. And often stay up late to bring direct symptom is confused work the next day, inability to concentrate, and even migraine headaches occur. Two hurt: stomach who burn the midnight oil crisis, it is easy to feel tired, eat "supper" can be a major source of vitality who stay up late, but may have detonated the stomach after the crisis, "supper", but also people have to worry, because life human gastric epithelial cells is very short, an average of 2-3 days to go renewable once updated. When this process is generally carried out at night to rest the gastrointestinal tract. If you often eat at night, without the necessary rest of the gastrointestinal tract, gastric mucosal repair impossible smoothly. And when you sleep at night, eat supper long stagnation in the stomach, can cause secretion of gastric juice, gastric irritation, over time, easily lead to gastric erosions, ulcers. Three hurt: heart disease risk studies have shown, time for physical adjustment disorder who is not as most people think, so easily, not only will bad temper, and higher risk of heart disease. Because the body's biological clock is not affected by light, clock. Especially as the heart and other organs, they will not rest during the day, and to stay up all night to do the adjustment, therefore, if the long-term "black and white reversed," people will increase the risk of heart disease. Injuries Four: Obesity 21:00 after eating generally referred to as "supper." The human body has two kinds of sympathetic and parasympathetic autonomic nervous system. Sympathetic is active in the body during the day to frequent digestive functioning, promote digestion and absorption; the night, parasympathetic activity, while the rest of the body, so that the intake of nutrients stored in the body. Night eating would not only make it difficult to fall asleep, but also the next day morning appetite, thus causing nutritional imbalance, can cause obesity. Injure five: a refreshing more trouble when you want to work late at night, you are not the first to think of a cup of coffee or tea to lift their spirits? Caffeine does indeed hark spirit of excitement, but caffeine is not necessarily effective in enhancing work efficiency, even helpful, it can only maintain short-term effect. Many people did not sleep the sleep, but * coffee or tea to refreshing, but at night the body's parasympathetic activity, the heart rate slows and gastrointestinal motility, drinking coffee and tea have a stimulating effect on the sympathetic nervous system, easily lead to visceral autonomic nervous system disorders. Although caffeine refreshing, relative body will consume vitamin B group with nerve and muscle coordination related to lack of vitamin B family would have been easier to tired, they are more likely to form a vicious cycle, to develop addicted to tea, coffee addicted to the habit, and requirements for getting bigger, the effect is worse. Writing in English learning is an effective means to develop and improve language skills, it helps to consolidate and master the vocabulary, grammar and other linguistic knowledge, help train directly learn the language of thinking, help to improve the ability to control language . The middle school students how to write English composition it?