共用题干Staying Active in Old Age Keeps People Mobile
People over 70 who aren't active are more likely to develop problems walking or climbing stairs within a few years,according to a new study.
These findings suggest that it's very important to stay________(1)in old age, study author Dr. Marjolein Visser told Reuters Health.
"Physical activity in old age is as important_________(2)taking your medications
（药物）,"Visser noted. "You do not need to join an expensive,fancy sports club with high-
tech（高科技的）equipment. Your body will already_______ ( 3 ) from regular
walking."
Visser , a Dutch（荷兰的）scholar, explained that________ ( 4 ) active helps
prevent people from becoming breathless during simple activities,increase muscle mass and
strength,and maintain the balance people need to walk up stairs,for instance.
To investigate how important exercise is to older adults,Visser's team interviewed
3,075 men and_________(5)between the ages of 70 and 79,all of whom said they
had no problems walking one-quarter of a mile or climbing_________(6).The
investigators followed the subjects for 4 1 /2 years,noting who developed problems
________(7)and climbing stairs.
During the study,34 percent of men and 47________(8)of women said they
began to struggle with walking and climbing stairs.People________(9)were inactive
were twice as likely to report these problems as people who said they got regular exercise.
People who didn't exercise but had active lifestyles appeared to be at a somewhat
higher risk of developing__________(10)walking and climbing stairs,relative to people
who exercised__________(11).Still,leading an active lifestyle appeared to protect
people___________(12)problems better than being generally inactive,the researchers
report in the Journal of the American Geriatrics（老年医学）Society.
Among people who were inactive,__________(13)who walked even a little bit-such as
brisk（轻快的）walking for a little over an hour per week-were at a lower________(14) of
mobility（可动性）problems.
"If you do not like to exercise or you cannot exercise__________(15)of serious
health problems or functional limitations,do try to be as active as possible,"Visser advised. _________(15) A:since B:owing C:because D:due
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More About Alzheimer' s Disease
Scientists have developed skin tests that may be used in the future to identify people with Alzheimer's
disease and may ultimately allow physicians to predict who is at risk of getting this neurological
（神经病学的）disorder.
The only current means of diagnosing the disease in a living patient is a long and expensive series of
tests that eliminate every other cause of dementia.
"Since Alois Alzheimer described the disease nearly a century ago,people have been trying to find a
way to accurately diagnose it in its early stages,"said Patricia Grady,acting director of the National Institute
of Neurological Disorders and Stroke in Bethesda,Maryland."This discovery,if confirmed,could prove a big
step forward in our efforts to deal with and understand the disease."
Alzheimer's is the single greatest cause of mental deterioration in older people,affecting between 2.5
million and 4 million people in the United States alone.The devastating disorder gradually destroys memory and
the ability to function,and eventually causes death. There is currently no known treatment for the disease.
Researchers discovered that the skin cells of Alzheimer's patients have defects that interfere with their
ability to regulate the flow of potassium in and out of the cells.The fact that the cell defects are present in the
skin suggests that Alzheimer's results from physiological changes throughout the body,and that dementia may
be the first noticeable effect of these changes as the defects affect the cells in the brain,scientists said.
The flow of potassium is especially critical in cells responsible for memory formation.The scientists also
found two other defects that affect the cells' supply of calcium,another critical element.
One test developed by researches calls for growing skin cells in a laboratory culture and then testing
them with an electrical detector to determine if the microscopic tunnels that govern the flow of potassium are
open.Open potassium channels create a unique electrical signature.
A spokesman for the Alzheimer's Association said that if the validity of the diagnostic test can be
proven it would be an important development,but he cautioned that other promising tests for Alzheimer's
have been disappointing. The passage indicates that Alzheimer's is a disease________.A:common to people,old and youngB:not costly to be curedC:easy to be handledD:not easy to be diagnosed
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