综合写作：
Rapid eye movement (REM) sleep is one of the stages of the normal sleep cycle. It occurs several times each night in humans and many other mammals. REM sleep is a very specific type of sleep, quite different from other sleep stages: during REM sleep, the sleeper’s eyes move rapidly back and forth under closed eyelids, the brain shows very specific patterns of activity, and the sleeper experiences unusually vivid dreams. However, scientists are still uncertain exactly why REM sleep happens.
Regulate digestion
One theory is that REM sleep is important for regulating essential processes in the body, like digesting food. A study showed that when rats were deprived of REM sleep, their eating habits changed: they were hungrier and ate more, and yet they continued to lose weight, eventually becoming weak and ill. These experiments may shed light on the function of REM sleep in all mammals, including humans.
Memory
Another explanation is that REM sleep is involved in memory formation. Researchers who measured electrical activity in human brains found that a particular brain area, called the hippocampus, is highly active when people are learning new things and committing them to memory. But the hippocampus is also very active during REM sleep.This suggests that REM sleep is important for transferring new things that have been learned into memory.
Relationships
Finally, some researchers believe that REM sleep may help people communicate and form relationships by influencing daytime moods and behaviors. It is known that the vivid dreams that occur during REM sleep create powerful emotions that often continue after waking. People respond to emotions in others; a person who shows or shares emotions is more likely to form successful relationships than a person who does not. In this way, REM sleep and the emotions it creates help people form and solidify interpersonal relationships.
学术写作：
Your professor is teaching a class on business management. Write a post responding to the professor’s question.
In your response, you should do the following:
- Express and support your opinion.
- Make a contribution to the discussion in your own words.
An effective response will contain at least 100 words.
Dr. Diaz
We’ve been discussing employee working arrangements—whether employees should report to an office or work at home. Some businesses require all employees to work in the office. Others choose not to have a physical office and have all employees work from home. In industries where remote work is possible, what is the most important factor for employers to consider when deciding where employees should work, and why?
Claire
I don’t think businesses should allow their employees to work from home, because creating a sense of community and camaraderie among employees is so important for the success of a business, especially if it’s a small business. It is challenging to develop that dynamic when employees are not together physically in the same space.
Andrew
I think the most important thing to consider is the bottom line—keeping company expenses down. For example, requiring all employees to work from home might be the best option from an economic standpoint. Renting office space is expensive, as are the utility bills. Think of how much money a business could save if employees worked from home.
