牛肉汤可以放多久？

The user is asking: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python." (Return only clean HTML code (h2/p/strong), without introduction, without conclusion, without markdown tags, without code, without python tags.) However, the user hasn't specified what content they want in HTML.

Wait, let's check Rule 1 of follow-up rules: "If critical information is genuinely missing and the prompt cannot be reasonably answered without it, ask a brief clarifying question before generating a full solution." Wait, the prompt says "Retourne uniquement le code HTML propre...". Since there is no topic provided, what should be returned? Or is there any hidden context? None. Wait, let's look at the instruction: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python." If no content is specified, I can provide a simple example or ask a clarifying question, but wait, the prompt says "sans introduction, sans conclusion". If I ask a clarifying question, I violate "sans introduction, sans conclusion". Let's provide a basic placeholder HTML structure using only h2, p, and strong as requested, matching the strict constraints, or let's create a placeholder about something neutral or generic. Or let's see if there's any standard interpretation. Let's provide a clean snippet. Wait, let's make sure it has no markdown blocks (like ), just raw HTML text.

Let's check the rules: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python."

Let's output raw HTML: