📚 IGCSE Computer Science: Essay Writing Template | IGCSE 计算机：Essay写作模板
Essay questions in IGCSE Computer Science require clear structure, precise technical vocabulary, and the ability to explain concepts, evaluate trade-offs, and apply knowledge to scenarios. This article provides a practical writing template that you can adapt to any long-answer question, helping you earn top marks by demonstrating depth and clarity of thought.
IGCSE 计算机科学中的论述题要求结构清晰、技术术语准确，并能解释概念、评估权衡以及将知识应用于实际情境。本文提供了一个实用的写作模板，你可以将其应用于任何长答题，帮助你通过展现思考的深度和清晰度来获得高分。
1. Understanding the Command Words | 理解指令词
Before writing, identify the command word in the question. Words like ‘describe’, ‘explain’, ‘compare’, ‘evaluate’ and ‘discuss’ each demand a different approach. A description requires technical facts; an explanation needs reasons and effects; a comparison demands similarities and differences; an evaluation must give balanced arguments and a justified conclusion.
动笔之前，要识别题目中的指令词。“描述”、“解释”、“比较”、“评估”和“讨论”等词各自要求不同的写法。描述需要技术事实；解释需要理由和影响；比较需要相似点和不同点；评估则必须提出正反两面的论点并给出有理有据的结论。
2. The 5-Minute Planning Stage | 5分钟规划阶段
Use the first five minutes to brainstorm key points on the question paper. Jot down technical terms, relevant examples, and a simple outline: introduction → 2–3 main body paragraphs → conclusion. Planning prevents rambling and ensures you address all parts of the question.
用前五分钟在试卷上头脑风暴关键点。快速写下技术术语、相关例子以及一个简单提纲：引言 → 2–3 个主体段落 → 结论。规划可以防止跑题，确保你回应了问题的所有部分。
3. Introduction Template | 引言模板
An effective introduction defines the topic, states your understanding of the question, and signposts the structure. Template: ‘The question focuses on [topic]. This is important in computing because [reason]. In this essay I will first discuss [point 1], then explore [point 2], and finally evaluate [point 3].’
有效的引言要定义主题，表明你对问题的理解，并预告结构。模板：“本题聚焦于[主题]。这在计算领域很重要，因为[原因]。在这篇文章中，我将首先讨论[要点1]，然后探究[要点2]，最后评估[要点3]。”
4. Body Paragraph Template – PEEL | 主体段落模板 – PEEL
Structure each body paragraph using PEEL: Point, Evidence, Explanation, Link. Start with a clear topic sentence (Point). Provide technical details or a concrete example (Evidence). Explain how the example supports your point and why it matters (Explanation). Finally, link back to the question or to the next paragraph (Link).
使用 PEEL 结构来组织每个主体段落：观点、证据、解释、连接。以明确的主题句开头（观点）。提供技术细节或具体例子（证据）。解释该例子如何支持你的观点及其重要性（解释）。最后，回扣题目或连接到下一段（连接）。
5. Conclusion Template | 结论模板
A strong conclusion summarises the main arguments without introducing new material, then offers a final judgement if the question asks for evaluation. Template: ‘In conclusion, while [point A] offers …, [point B] is more significant because … . Overall, the best approach is … because … .’
有力的结论总结主要论点而不引入新内容，然后如果题目要求评估，则给出最终判断。模板：“总之，虽然[论点A]提供了……，但[论点B]更为重要，因为……。总体而言，最佳方法是……，因为……。”
6. Describing Technical Processes | 描述技术流程
When describing how something works (e.g. a CPU fetch-execute cycle, packet switching), use a logical sequence. Number the steps mentally and use sequencing language: ‘First, the control unit fetches the instruction from memory. Next, the instruction is decoded. Then, the ALU executes the operation. Finally, the result is stored.’ Diagrams are not required in essays, but your words must paint a clear picture.
描述某物如何工作（例如 CPU 取指-执行周期、数据包交换）时，要使用逻辑顺序。在心里为步骤编号，并使用序列语言：“首先，控制单元从内存中取出指令。接着，指令被解码。然后，ALU 执行操作。最后，结果被存储。”论述题中不需要画图，但你的文字必须描绘出清晰的画面。
7. Explaining with ‘Because’ | 用“因为”进行解释
‘Explain’ questions require causal reasoning. After stating a fact, immediately follow with ‘because’ and the reason or consequence. For example, ‘Solid-state storage is preferred in portable devices because it has no moving parts, making it more resistant to physical shock and consuming less power.’ This shows understanding beyond mere recall.
“解释”类题目要求因果推理。陈述一个事实后，马上用“因为”引出原因或结果。例如：“固态存储更适合便携式设备，因为它没有活动部件，使其更耐物理冲击且功耗更低。”这展示了你超越简单记忆的理解。
8. Comparing and Contrasting | 比较与对比
For comparison questions, use a point-by-point or block structure. Point-by-point alternates between the two items for each characteristic; block discusses all features of one then all features of the other. Always use comparative language: ‘In contrast to magnetic storage, solid-state drives have faster access times and are silent in operation. However, magnetic storage offers a lower cost per gigabyte.’
对于比较类题目，可以使用逐点比较或分块结构。逐点比较是针对每个特征在两个项目之间交替讨论；分块结构是先讨论一个项目的所有特征，再讨论另一个项目的所有特征。始终使用比较性语言：“与磁存储相比，固态硬盘具有更快的访问速度和静音运行的优势。然而，磁存储的每 GB 成本更低。”
9. Evaluating Trade-offs | 评估权衡
Evaluation questions expect balanced arguments about strengths and weaknesses, considering context. Use phrases like ‘One advantage is …, but a significant drawback is … .’ Then weigh the points: ‘Given the requirement for high reliability, the advantage of error-correction codes outweighs the extra processing overhead.’ A conclusion with justification is essential.
评估类题目要求对优缺点进行平衡论证，并考虑具体情境。使用诸如“一个优点是……，但一个重大缺点是……”的句式。然后权衡各点：“考虑到对高可靠性的要求，纠错码的优势超过了额外的处理开销。”带有理由的结论至关重要。
10. Time Management in the Exam | 考试时间管理
Allocate time based on marks. For a 12-mark essay within a 1-hour 45-minute paper, spend about 15–18 minutes. Divide this: 3 minutes planning, 10–12 minutes writing, 3 minutes reviewing. Stick to this limit; a perfect essay that is unfinished loses more marks than a completed, slightly less polished one.
根据分值分配时间。对于 1 小时 45 分钟的试卷中的一道 12 分论述题，花大约 15-18 分钟。细分：3 分钟规划，10-12 分钟写作，3 分钟检查。严格遵守时间限制；一篇完美但未完成的文章比一篇完整但稍欠修饰的文章失分更多。
11. Using Precise Technical Terminology | 使用精确的技术术语
Examiners look for accurate subject-specific vocabulary. Instead of ‘saves data temporarily’, write ‘volatile storage such as RAM holds data only while powered’. Instead of ‘keeps data even when off’, write ‘non-volatile storage retains data without power’. Build a glossary of terms like ‘protocol’, ‘abstraction’, ‘bandwidth’, ‘latency’, ‘encryption’, ‘denary’, ‘hexadecimal’, ‘logic gate’, and use them confidently.
考官会寻找准确的学科专用词汇。不要写“暂时保存数据”，而要写“易失性存储，如 RAM，仅在通电时保存数据”。不要写“关机仍能保存数据”，而要写“非易失性存储无需电源即可保留数据”。建立一个术语表，如“协议”、“抽象”、“带宽”、“延迟”、“加密”、“十进制”、“十六进制”、“逻辑门”，并自信地使用它们。
12. Checking and Refining Your Answer | 检查与优化答案
In the final review, check: Have you answered all parts of the question? Are technical terms spelled correctly? Is the argument logical? Can you add a quick example? Correct obvious errors neatly. This final pass often makes the difference between a grade B and an A.
在最后的检查中，确认：你是否回答了问题的所有部分？技术术语拼写是否正确？论证是否符合逻辑？能否快速补充一个例子？整洁地改正明显错误。这最后一关往往就是 B 等和 A 等的区别。
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