2013年12月英语四级作文真题附范文(第2套):手机

The hazards of excessive use of mobile phones include: fatigue, metabolism, endocrine disorder, cervical injury, lumbar injury, cervical "Climbing", skin allergy, eye injury, tenosynovitis, narrowed life circle, increased loneliness, interpersonal relationship, loss of attention, ability to reduce thinking, and "digital dementia". 1. Temporary smartphone blindness Many people lie on their side and play with their mobile phones. One eye is blocked by a pillow, while only one eye is looking at the mobile phone. When one eye uses a smart phone for a long time, one eye of the mobile phone adapts to the light of the mobile phone, while the one eye blocked by the pillow adapts to the dark environment. When the eyes are in the dark, the one that adapts to the strong light will be blind. This difference will last for several minutes, reflecting the gradual recovery process of the eyes after experiencing photosensitive stimulation, which is greatly detrimental to the health of the eyes. 2. Affect sleep The screen of smart phones and tablets will produce blue light, which will affect our sleep cycle. The reason for this is that blue light will reduce the production of melatonin in the human brain, which is one of the key factors for the human body to enter the sleep state. Relevant medical research shows that it not only inhibits the secretion of human hormones, but also delays the sleep time when using tools in bed. Using a smartphone can disrupt hormone production and make it more difficult to fall asleep. Although some mobile phones now have anti blue light mode, but this is an indicator of incurable, overuse, problems will still arise. It's best to turn off your phone an hour before you go to bed, relax your nervous system and calibrate your sleep. 3. Causing physical discomfort Phenomena such as "SMS neck" or "cell phone elbow" have appeared more and more. Many people suffer from neck discomfort caused by long-term use of mobile phones. When a person bends his neck for a long time to look at a mobile phone, the symptom of "SMS neck" will appear. When you hold your cell phone to your ear for a long time to make a phone call, you will have the problem of "cell phone elbow". 4. It is easy to cause accidents when sending information while walking Sometimes it may cause unimaginable consequences if you don't look at the front when using a mobile phone. Texting while driving is the most deadly, and texting while walking is also very harmful, which is more harmful than calling while walking, because when you send a message, you can't see where you are going. Texting while walking not only makes walking slower, but also makes it easier to deviate from the walking route. 5. Addiction The biggest harm of smart phones lies in their potential addiction. In the latest poll, 50% of children and 27% of parents are addicted to smartphones. Because behavior and material can make people addicted, because many people will check their mobile phones frequently, it is not difficult to imagine that mobile phone addiction has become a common problem in society. Whether for mental health or physical health, consciously reducing the use of mobile phones is a good way. Unless you do need to carry your mobile phone with you, leave it at home when you go out, or in another room when you are at home, and put it in your bag when you work. Never put your cell phone in bed or use it in bed. Smart phones are useful and interesting, but when they affect our lives, they need to be enough.