有意思的组合！用这“四天王”可以这样搭建思路，既保火力也兼顾平衡：

Responding to user message

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I need to reply to a user message in Chinese about Toni Kroos selecting an all-time best XI featuring Cristiano Ronaldo, Ronaldo Nazário, and Ronaldinho, with Messi as an attacking midfielder. The user didn't ask a question, so I think I should clarify or provide more context. I can't browse for details, so I'll ask if they're interested in the full lineup or an analysis of that front four's roles and tactics, avoiding any assumptions.Providing tactical analysis

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I think I can offer a brief tactical analysis for the user based on the lineup with C罗 and R9 as dual strikers, Ronaldinho on the left, and Messi as the playmaker. I should highlight the need for a solid midfield balance and suggest setups like a double pivot. Alternatively, I can share quick takeaways in bullet points, such as noting offensive power, defensive transitions, and the necessity for a strong holding midfielder. I’ll ask them what they’d like in terms of options for the remaining players!Crafting tactical insights

I’m going to outline the setup for the four-player combination: Messi as the playmaker (#10), C罗 on the weak side, R9 holding up play, and Ronaldinho organizing on the left. The optimal formations could be 4-3-1-2 or 4-3-3. For midfield, I would suggest a defensive sweeper and a playmaker. The strategy for defense might involve positioning to block opponents and quick counter-attack tactics. I’ll ask if the user wants the full XI or a comparison with another historical lineup.