考研学姐的作文写作方法可以总结为以下几个步骤：
框架构建
三段式结构：经典三段式，中间长两头短。第一段为引言和总体描述，第二段为详细描述和原因分析，第三段为总结和建议。
总体描述
结构：人物/动物/事物 + 动作 + 环境（图画）或主题 + 对象 + 时间（图表）。
表达方式：使用形象的语言描述图画中的内容，如“The picture/cartoon symbolically shows/describes/depicts that…”。
细节描述
内容：对图画中的细节进行详细描述，一般写2-3句。
技巧：挖掘细节词，连接成句，确保描述清晰、具体。
文字说明/象征寓意
内容：对图画或漫画中的文字说明或象征意义进行解释。
表达方式：简洁明了地说明文字或象征的含义，如“The caption…”。
原因分析
结构：列出几个原因，逐一解释。
表达方式：使用“Firstly, Secondly, Thirdly”等连接词，使文章结构清晰。
总结和建议
内容：总结全文，提出针对问题的建议。
表达方式：建议要具体、可行，如“It is high time that something were done upon it.”。
范文示例
说明原因型议论文
题目：环境问题及其原因
第一段：
As is vividly shown in the picture, environmental pollution has become a serious issue in many big cities. It is estimated that the number of cars has increased dramatically in the past decade, leading to severe air pollution.
第二段：
Firstly, the rapid urbanization has led to a surge in the number of vehicles, which in turn has increased the emissions of harmful gases. Secondly, the lack of efficient public transportation systems has encouraged more people to use private cars. Moreover, the construction activities in cities often involve the use of heavy machinery, contributing to dust and noise pollution.
第三段：
To address these issues, it is crucial to implement stricter emission standards for vehicles and promote the development of public transportation. Additionally, city planners should encourage green construction practices that minimize dust and noise pollution. By taking these measures, we can significantly reduce the environmental impact of urbanization.
建议
推广清洁能源汽车：
鼓励使用电动汽车、混合动力汽车等清洁能源汽车，减少化石燃料的依赖。
完善公共交通系统：
加大投入，改善公共交通设施，提高公共交通的便捷性和舒适度。
绿色施工：
在施工过程中采取降尘措施，减少噪音和空气污染。
通过以上步骤和技巧，考研学姐可以有效地构建一篇结构清晰、内容充实的作文，从而在考研中取得优异成绩。