1 . Some people can't wait for the lovely colors, cooler weather, and cozy sweaters of autumn. In fact, fall is Americans' favorite time, but for a minority of others, the transition from summer creates worry, fear and worse. According to Carrie Landin, a psychologist from the University of Colorado Health Integrative Medicine Center, a significant number of people actually experience autumn anxiety.

For some people, stress is triggered (触发) by environmental factors: Decreases in daylight cause chemical changes in the brain. "Less daylight leads to lower levels of chemicals like serotonin and dopamine that control our emotions," says Kimberly Asner-self, associate professor at Touro Colleges` School of Health Sciences. "As these chemicals drop, the body responds by increasing levels of cortisol. the hormone released in situations where we face threat." The result can be an increased anxiety, difficulty sleeping and depression.

But it's not just increasing darkness that can trigger these symptoms. For people who feel this way every year, some of the reaction is mental. "When we know there's the potential for stress ahead we tend to anticipate the problems, feeling anxious before they even happen," Landin says.

The fall features more than its fair share of impending (迫在眉睫) events: back to school at the beginning of the season and family get-togethers toward the end. Mayra Mendez, a psychologist from Providence Saint Johns Health Center, suggests identifying your personal triggers and making a plan to manage them before they feel overwhelming. For instance, if you're concerned about family issues and holiday parties, decide in advance that it's perfectly OK to say no to some of them. If fall's stricter work and school schedules make you anxious, plan regular breaks and vacations to look forward to.

Finally, you should also find ways to embrace the present moment. Remember: while autumn may throw you a few tricks, there are plenty of treats to be found too.

1. What may be the cause of autumn anxiety?

A．Cooler weather.	B．Less daylight.
C．Sleep difficulties.	D．Vacation plans.

2. Landin's words are mentioned in paragraph 3 to show__________.

A．potential stress can be predictable	B．stress can be triggered by chemicals
C．depression is related to family issues	D．anxiety can be caused by mental factors

3. What does the author probably think of autumn stress?

A．Manageable.	B．Overwhelming.
C．Troublesome.	D．Beneficial.

4. What can be the best title for the text?

A．Seasonal Anxiety	B．Tricks or Treats
C．The Autumn Blues	D．Characteristics of Fall