The committee said there was no justification for screening the large majority of men for prostate cancer.
Here's a problem that shows up in math competitions and quant interviews:
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精细结构常数最令人迷惑的就是它的值恰好落在允许生命存在的极窄窗口内，至少目前来看，在实验误差范围内它没有随时间发生变化。
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