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阅读下面的材料，根据要求写一篇不少于800字的文章。

    美国哈佛大学有一个非常著名的关于目标对人生影响的跟踪调查。对象是一群智力、学历、环境等条件差不多的年轻人，调查结果发现：

    27％的人没有目标；60％的人目标模糊；10％的人有清晰但比较短期的目标；3％的人有清晰且长期的目标，并能把目标写下来，经常对照检查。

    25年的跟踪研究结果，他们的生活状况和分布现象十分有意思。

    那些占3％的，25年来几乎不曾更改过自己的人生目标，朝着同一方向不懈地努力。25年后，他们几乎都成了社会各界的顶尖成功人士，他们中不乏白手创业者、行业领袖、社会精英。

    那些占10％的，大都生活在社会的中上层。他们的共同特点是，那些短期目标不断被达成，生活状态稳步上升，成为各行各业不可缺的专业人士，如：医生、律师、工程师、高级主管等等。

    其中占60％的目标模糊的人，几乎都生活在社会的中下层面，他们能安稳地生活与工作，但都没有什么特别的成绩。

    剩下27％的是那些25年来都没有目标的人群，他们几乎都生活在社会的最底层。他们的生活过得不如意，常常失业，靠社会救济，并且常常都在抱怨他人，抱怨社会，抱怨世界。

    对于以上的情况，你怎么看？请结合材料内容及含意，选好角度，确定立意，明确文体，自拟标题，不要套作，不得抄袭。

阅读下面四篇短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

B

    Think of life as a game in which you are playing with five balls in the air. You name them work, family, health, friends and spirit and you keep all of them in the air. You will soon understand that work is a rubber ball. If you drop it, it will bounce back.　　

    But the other four balls, family, health, friends and spirit, are made of glass. If you drop one of these, it will be broken and never be the same. You must understand that and try to have balance in your life. How ?　　

    Don't look down on your worth by comparing yourself with others. It is because we are different and each of us is special.　　

    Don't let other people set goals for you. Only you know what is best for yourself.　　

    Don't give up when you still have something to give. Nothing is really over until the moment you stop trying.

    Don't be afraid of difficulties. It is by taking chances that we learn how to be brave.

    Don't shut love out of your life by saying it's impossible. The quickest way to receive love is to give it; the fastest way to lose love is to hold it too tightly; the best way to keep love is to give it wings.　　

    Don't run through life so fast that you forget not only where you've been, but also where you are going.　　

    Don't be afraid to learn. Knowledge is weightless. It's a treasure you can always carry easily.　　

    Don't use time or words carelessly. You can't get them back. Yesterday is history, tomorrow is a mystery*, and today is a gift; that's why we call it “the present”. Life is not a competition, but a trip, step by step.　

配制500g 0.9%的生理盐水，不需要的仪器是（　　）