本文探讨了通过仔细分析小问题来获得巨大实际效益的方法，并强调了选择合适的基本元素解决问题的重要性。文章还提到了编写简洁有效代码的价值，以及在解决重要问题时进行仔细编码和验证的重要性。
i. PRELIMINARIES
1. Careful analysis of a small problem can sometimes yield tremendous practical benefits. see <Software Requirements & Specifications>
2. What primitives will we use to solve the problem? see <aha! insight>
3. Don't write a big program whe a little one will do. see <How to Solve It>
4. The problem is important and requires careful code, the development of the program is important and and requires careful code, the development of program is guided by verification ideas, and the anaylysis of correctness employs general tools.
5. effort at a little problem: Scaffolding->pseudocode
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