1 . When people think about improving their physical fitness, they often neglect (忽视) balance. Good balance is a necessary part of being physically fit and key to living a long life, according to a research. It’s important for everyone, no matter your age.

Older adults are most affected by poor balance. Falls are the leading cause of injury and death for those 65 and older, with nearly 30% in this age group reporting at least one fall in 2018, according to the US Centers for Disease Control and Prevention. But younger adults frequently fall down, too.

Forty-eight percent of young adults reported falling at least once during one 16-week study. The falls most commonly happened during sports activities, with women in the study reporting more falls and fall-related injuries than men.

Falls within the previous two years were reported by 18% of young adults (ages 20 to 45) in another study published in the journal BMC Public Health. That figure (数据) compared with 21% of middle-aged adults (46 to 65) reporting falls and 35% of those over 65. While falls among young adults were often connected with sports, falls by the middle-aged group were typically related to health problems and physical changes.

Many factors (因素) can affect your balance outside of age, such as vision changes, brain injuries, overweight and a general lack of physical fitness. Even if you have no risk factors, simply neglecting to work regularly on your balance will result in increased instability (不稳定性).

“Our body is conditioned to lose what we don’t regularly use and practice, and balance is no different,” said a researcher.

1. What role does a good balance play in our lives?

A．It helps us live a healthy and long life.

B．It enables us to build a perfect shape.

C．It protects us from getting seriously sick.

D．It has the power to make us look young.

2. How does the author show the research results?

A．By having a discussion.	B．By giving a list of figures.
C．By raising questions.	D．By following the time order.

3. In which situation are young adults likely to fall down?

A．When a health problem comes up.	B．When working regularly.
C．When a physical change appears.	D．When joining in a sport.

4. What can we learn from the last paragraph?

A．We are naturally born with balance.

B．We should manage our body properly.

C．Our body is used to working in its own way.

D．We’ll lose our balance if we don’t practise it often.