One of the most important differences in coronary heart disease (CHD) is that the deathrate from CHD is decreasing for men while it is constant or rising for women.
男女患冠心病（CHD）最大的不同之处是：男性死亡率在下降，而女性持高不降。
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We extend the traditional constant interest rate reserve model in life insurance with premium paid each year until death.