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下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第3～6段每段选择1个最佳标题：(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
Facts about Stroke
1
Every 45 seconds, someone in America has a stroke. Every 3.1 minutes, someone
dies of one. Stroke killed an estimated 167,661 people in 2000 and is the
nation's third leading cause of death, ranking behind diseases of the heart and
all forms of cancer. Stroke is a leading cause a serious, long-term disability
in the United States.
2 Stroke is a type of
cardiovascular(心血管的)disease. It affects the arteries (动脉)leading to and within
the brain. A stroke occurs when a blood vessel that carries oxygen and
nutrients(营养物) to the brain is either blocked by a clot(凝块)or bursts. When that
happens, part of the brain cannot get the blood (and oxygen) it needs, so it
starts to die.
3 The brain is an extremely complex organ that
controls various body functions. If a stroke occurs and blood flow can't reach
the region that controls a particular body function, that part of the body won't
work as it should. If the stroke occurs toward the back of the brain, for
instance, it's likely that some disability involving vision will result. The
effects of a stroke depend primarily on the location of the obstruction(阻塞) and
the extent of brain tissue affected.
4 The American Stroke
Association has identified several factors that increase the risk of stroke. The
more risk factors a person has, the greater the chance that he or she will have
a stroke. Some of these you can't control, such as increasing age, family health
history, race, and prior stroke. But you can change or treat other risk factors
to lower your risk. Factors resulting from life-style or environment can be
modified with a healthcare provider's help. Some of these include: high blood
pressure, current smoking, heart disease, and high red blood cell
count.
5 A stroke can happen to anyone at any moment. In fact
about 600,000 people have strokes every year. For many years, there was no hope
for those suffering a stroke. However, recent breakthroughs have led to new
treatments. For the treatments to work, the person must get to a hospital
immediately.
A. Effects of a stroke
B. Annual cost of
stroke in the US
C. Definition and description of a
stroke
D. Breakthroughs in treatment
E. Risk
factors of stroke
F. Warning signs of a stroke