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阅读理解：请根据短文内容，为每题确定l个最佳选项。 A New Strategy to Overcome Breast Cancer。 Post-menopausal（绝经后）women who walk for an hour a day can cut their chance of breast cancer significantly,a study has suggested. The report, which followed 73,000 women for 17 years,found walking for at least seven hours a week lowered the risk of the disease.The American Cancer Society team said this was the first time reduced risk was specifically linked to walking. UK experts said it was more evidence that lifestyle influenced cancer risk. A recent poll for the charity Ramblers a quarter of adults walk for no more than an hour a week,but being active is known to reduce the risk of a number of cancers.This study, published in Cancer Epidemiology,Biomarkers&Prevention,followed 73.615 women out of 97,785 aged 50-74 who had been recruited by the American Cancer Society between 1992 and 1993,so it could monitor the incidence of cancer in the group. They were asked to complete questionnaires on their health and on how much time they were active and participating in activities such as walking,swimming and aerobics（有氧运动）and how much time they spent sitting watching television or reading.They completed the same questionnaires at two-year intervals between 1997 and 2009. Of the women,47% said walking was their only recreational activity.Those who walked for at least seven hours per week had a 14% lower risk of breast cancer compared to those who walked three or fewer hours per week. Dr. Alpa Patel, a senior epidemiologist at the American Cancer Society in Atlanta, Georgia, who led the study, said:”Given that more than 60% of women report some daily walking, promoting walking as a healthy leisure-time activity could be an effective strategy for increasing physical activity amongst post-menopausal women.We were pleased to find that without any other recreational activity, just walking one hour a day was associated with a lower risk of breast cancer in these women.””More strenuous（紧张的）and longer activities lowered the risk even more.” Baroness Delyth Morgan, chief executive of Breast Cancer Campaign,said:”This study adds further evidence that our lifestyle choices can play a part in influencing the risk of breast cancer and even small changes incorporate into our normal day-to-day activity can make a difference.” She added:”We know that the best weapon to overcoming breast cancer is the ability to stop it occurring in the first place. The challenge now is how we turn these findings into action and identify other sustainable lifestyle changes that will help us prevent breast cancer.”Dr. Alpa Patel was_____.
教育理论
男性，35岁，头晕、乏力伴出血倾向半年，加重1周半年前无诱因开始头晕、乏力，间断下肢皮肤出血点，刷牙出血，服过20多剂中药不见好转，1周来加重。病后无鼻出血和黑便，二便正常，进食好，无挑食和偏食，无酱油色尿，睡眠可，体重无变化。既往体健，无放射线和毒物接触史，无药敏史。查体：T36℃，P100次/分，R20次/分，BP120/70mmHg，贫血貌，双下肢散在出血点，浅表淋巴结未触及，巩膜不黄，舌乳头正常，胸骨无压痛，心肺无异常，肝脾未触及，下肢不肿。化验：Hb45g/L,RBC1.5×1012/L,网织红细胞0.1%,WBC3.0×109/L,分类：中性分叶30%，淋巴65%，单核5%，plt35×109/L，中性粒细胞碱性磷酸酶(NAP)阳性率80%，积分200分，血清铁蛋白210μg/L，血清铁170μg/dl,总铁结合力280μg/dl，尿常规(-),尿Rous试验阴性。
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