62．What can we infer from the text?
A．The first settlers left their
hometown for political and religious reasons．
B．Many Americans don′t trust the central government．
C．American people enjoy building
things for their homes just for fun．
D．Americans continue their education
at their own expense．
C
Worldwide，almost as many women as men die from heart disease．Yet most treatment methods have
come from studies of men．Researchers are now learning more about ways that heart．disease can be different in women．
For example，they say a condition called coronary microvascular syndrome(冠脉微血管综合症)appears to be more common
in women than men．
When a heart attack is suspected，doctors look for a major blockage(阻塞物)in the arteries(动脉)that supply oxygen to the heart．With coronary microvascular
syndrome，fatty
material spreads evenly(均匀地)in very small arteries of the heart．This buildup of plaque(血小板)along the artery wall narrows the flow of oxygen．The pain can be similar to that of
blocked arteries．
But doctors often miss this condition
because it does not show up in the usual tests for blockages. Women are often
sent home，thinking they
are OK．Yet many are
at high risk for a heart attack．
In USA，researchers say as many as three million women could have coronary
microvascular syndrome．The Journal of the American College of Cardiology recently published
findings from a government study．
The study is called the Women's Ischemia
Syndrome Evaluation(妇女缺血综合征的评价)，or WISE．Ischemic heart disease involves
restricted blood flow．The study began in nineteen ninety-six and involves more than nine
hundred women who suffer chest pain．
Researchers found large blockages in major
arteries in about one-third of the women．The other women looked clear on an angiogram(血管造影)test for blockages．But the researchers say half of
them had enough buildup in small arteries to cause a heart attack within five
years．
In men and women both，the most common warning sign is
chest pain．But women are
more likely to experience other common signs like shortness of breath，a sick stomach and pain in the back
or jaw．A cold sweat
and feeling lightheaded can also mean a heart attack．