在输出"翻车"前，先检查您的提示

为了帮助同事提升提示工程能力，您向他们讲解了四段式提示框架。您的同事 Katie 希望您审阅她的提示并给出改进建议。以下是她的提示：

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Rewrite this email subject line and opening sentence to grab attention and encourage people to read on.

Keep it concise and conversational — the subject line under 8 words, and the opening sentence no longer than two lines. Use active voice and a friendly tone that feels personal, not corporate.

Here's an example: Subject: "Your plan just got better 🎉" Opening line: "We've upgraded your subscription with new perks — no extra cost, just more of what you love."

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这段提示涵盖了四段式提示框架中的哪些要素？