在2021年的英语二考研小作文中，考生们需要掌握以下关键点：
1. 话题明确：针对特定的情境，如请求帮助、提出建议、表达感谢等。
2. 结构清晰：开头介绍背景，中间展开具体内容，结尾进行总结或提出希望。
3. 语言得体：使用恰当的词汇和句型，保持礼貌和正式。
4. 内容充实：确保文章内容丰富，条理清晰。
以下是一篇示例：
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Dear [Name],
I am writing to express my sincere gratitude for your invaluable assistance during my recent trip to [Destination]. The kind hospitality and thoughtful suggestions you offered have made my journey unforgettable.
From the moment I arrived, you made me feel at home. Your recommendation of the best local cuisine and the sightseeing spots was spot on. It was truly a pleasure to have someone like you to guide me through this beautiful city.
I am grateful for the time you spent showing me around. Your kindness and generosity have left a lasting impression on me. I am looking forward to returning to [Destination] and experiencing more of its wonders.
Once again, thank you for everything. Your help has been invaluable, and I will cherish our friendship forever.
Warm regards,
[Your Name]
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