题目：【Reading Comprehension】

    `About 79 million Americans have pre-diabetes (糖尿病前期 ). That means they have blood sugar that ' s higher than normal but not high enough to be diagnosed (诊断) with type 2—at least not yet. One long-term study reported by the American Diabetes Association found that 11% of people with pre-diabetes develop the full-blown disease each year. Another study shows that pre-diabetes will probably become type 2 in 10 years or less.

    Yet,that process is not inevitable. Last year, scientists in Colorado found that people with pre-diabetes who lowered their blood sugar to normal levels-even briefly-were 56% less likely to reach type 2 levels.

    If you have pre-diabetes,here are four steps to help prevent or delay a diabetes diagnosis :

    Lose 7% of your body weight. That is about 15 pounds for the persons who weigh 200. Dropping that small percentage has been shown to lower the risk of developing type 2 by close t0 60%.

    Exercise 30 minutes five days a week. Whether you do the 30 minutes in one shot or in three 10-minute sessions,the benefit is the same. Choose certain exercises, such as fast walking, playing tennis or lifting weights. Physical activity such as sweeping floors works , too.

    Turn to your doctor. In some cases , pre-diabetes raises the risk of heart disease and stroke by 50%. Your doctor may use some medicine to control your glucose (萄萄糖) levels and keep your blood pressure in check.

    Know your numbers. To see if your pre-diabetes is improving , have your blood sugar checked regularly. A fasting blood sugar of 100 t0 125 mg/dl suggests pre-diabetes;126 mg/dl or above is diabetes;and below 100 is normal. Other tests ,including glucose tolerance and AIC , also are used to monitor blood sugar.

【问题】To prevent or delay a diabetes diagnosis, people with pre-diabetes should pay most attention to            .

A. heart disease 

B. glucose levels

C. stroke 

D. exercises

【答案】B

【考情点拨】理解推断题。

【应试指导】由倒数第二段第三句可知，医生会用药控制你体内的血糖水平;结合上下文也可知，血糖水平与糖尿病的各个时期相对应。由此可从推断出，为了推迟或阻止糖尿病发病，前期糖尿病患者应密切关注他们的血糖水平。

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