填空题

Heart disease is the leading killer of Americans, but it kills more women than men. The American Heart Association says heart disease and other cardiovascular (心血管的) (36) kill about 500,000 women a year. That is more than the next seven causes of death (37) .
In general, women are less likely than men to (38) heart attacks. One of the possible explanations has been that women are not treated as early or as (39) for heart disease. Most heart disease research traditionally involved men. But experts have (40) that heart disease may act differently in women. The Washington Post recently reported on these (41) .
Doctor Noel Bairey Merz, a heart expert in Los Angeles, says that unlike in men, heart disease in women is often found in the smaller arteries (动脉) which are often (42) .
Another difference may involve artery spasms (痉挛). A spasm (43) causes the artery to narrow. (44) . Heart experts say cardiovascular disease is often preventable. (45) . But researchers say the lining of arteries may also weaken in older women.
(46) . Another issue is treatment. The researchers say common drugs and other methods may not work as well for many women as for men. Heart experts agree that much more research is needed. Heart disease is the leading killer of Americans, but it kills more women than men. The American Heart Association says heart disease and other cardiovascular (心血管的) (36) kill about 500,000 women a year. That is more than the next seven causes of death (37) .
In general, women are less likely than men to (38) heart attacks. One of the possible explanations has been that women are not treated as early or as (39) for heart disease. Most heart disease research traditionally involved men. But experts have (40) that heart disease may act differently in women. The Washington Post recently reported on these (41) .
Doctor Noel Bairey Merz, a heart expert in Los Angeles, says that unlike in men, heart disease in women is often found in the smaller arteries (动脉) which are often (42) .
Another difference may involve artery spasms (痉挛). A spasm (43) causes the artery to narrow. (44) . Heart experts say cardiovascular disease is often preventable. (45) . But researchers say the lining of arteries may also weaken in older women.
(46) . Another issue is treatment. The researchers say common drugs and other methods may not work as well for many women as for men. Heart experts agree that much more research is needed.