举一反三
- 7. The risk of developing breast cancer in a certain population is 4%. A study investigating hormone replacement therapy finds that the hormone replacement therapy group has a 25% greater chance of getting breast cancer compared to the placebo group. Based on the study's finding, how many additional cases of breast cancer could one expect in a group of 100 women who undergo hormone replacement therapy compared with 100 who do not?
- If a new drug decreases the risk of breast cancer in postmenopausal women from 0.3% per year to 0.15% per year, which of the following accurately describes the change in risk?
- Women who have an abnormal gene have up to an 60% risk of developing breast cancer.
- If a new drug decreases the risk of breast cancer in postmenopausal women from 0.3% per year to 0.15% per year, which of the following risk descriptions is the most informative and transparent for a general audience?
- Which is not included in the risk factors for gastric cancer A: Dietary B: Helicobacter pylori C: Salted food D: EB virus E: Smoking and Drinking
内容
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中国大学MOOC: Babies have very immature immune systems and rely upon breast milk to ________ this deficiency as it contains protective factors.
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HeLa is a _____________ cell line A: Breast cancer B: Thyroid cancer C: Cervical cancer D: Prostate cancer
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Q5. The main idea of the text is _____. A: younger people are more susceptible to even small amounts of radiation B: no scientific evidence has been found about the effect of cosmic radiation C: radiation has the greatest effect on fast dividing and developing cells D: radiation may be a greater cancer risk for adults than doctors thought
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We evaluated the associations between serum omega-3 and omega-6 poly-unsaturated fatty acid levels and colon cancer risk in a study conducted between 1997 and 2002. We included 363 cases of colon cancer and 498 disease-free controls. Serum omega-3 poly-unsaturated fatty acid levels were inversely associated with colon cancer risk. Subjects in the upper 33% of serum omega-3 poly-unsaturated fatty acids had a 33% lower risk of colon cancer as compared with subjects in the lower 33% of serum omega-3 poly-unsaturated fatty acids. In contrast, the risk of colon cancer was increased by omega-6 poly-unsaturated fatty acids by 68%. This is the first study that simultaneously finds an inverse association of serum omega-3 poly-unsaturated fatty acids and a positive association of omega-6 poly-unsaturated fatty acids with colon cancer. The study design is a:
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Words may appear small and insignificant, yet they can have a ( ) and ( ) effect on us.