阅读下面的文字，根据要求作文。(60分)
“正能量”本是一个物理学名词。现在，社会上对这一词的使用频率很高。一切予人向上和希望、促使人不断追求、让生活变得圆满幸福的动力和感情，都可称为“正能量”。
你对“正能量”有何联想和感悟?请据此写一篇文章。可以编述故事，也可以抒发感情、议论说理。立意自定，题目自拟，文体自选(诗歌除外)，不少于800字。
略
题目分析：
这是一则给材料作文，要求对“正能量”进行评论。这则作文的关键是立意。可以从“类”、“因”、“法”、“果”四个角度入手。
“类”的角度。也就是论证正能量有哪些分类，哪些能量是正能量。
“因”的角度。也就是论证当今社会为什么需要正能量。
“法”的角度。也即是论证如何获得正能量、弘扬正能量。
“果”的角度，也就是论证弘扬正能量有何作用、意义、影响。
这四个角度，既可以选择一个角度立意，选择相关材料，连缀成文。也可以在一篇文章中，按照顺序，逐一论证。
| 用方框中所给单词的适当形式填空，使短文完整正确。（每个单词限用一次） | |
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| Playing sports like running every day l _ good to your longer life. But researchers at Boston University have also found people are likely(可能WJ) to live to age 100 or 2_____because of a kind of genes(基因) in people. The technique may also help doctors know 3_____ you may get a disease before tlie signs show up. Living a long, 4 .life lies in your fanulie.s. If your grandparents and parP.nts lived into their 90s and 5 healthy until the end, there's a pretty good chance vou will have, too. So it's 6 that genes play an important role in your ages. The Boston University researchar says this kind of findings are very 7 _ ancl important, not just in knowing who will live longest, but in 8 helping people live longer and healthier lives. As the cost of the 9 genetic tests goes on dropping , he says doctors will be able to screer patients for diseases they may not10 until later in life, and gave ways to avoid them. |