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Considering the user's options

I should ask the user what they'd prefer: verifying stats, discussing whether he should play U21, or looking into schedule optimization. It’s important to include some neutral commentary on the pros and cons of sending him to U21 after so many matches, like recovery guidelines and workload metrics. Since "还去踢U21联赛？" seems rhetorical, I might emphasize key factors like match exposure and injury risk. I’ll suggest monitoring workload ratios and propose some guidelines. Finally, I can ask if they’d like a quick rundown of his teams and matches this year.Crafting a concise response

I don't need to run any shell commands. Let's create a concise answer using bullet points.

First, I should highlight the risk of having 44 matches across five teams, indicating a congested schedule. It's crucial to focus on minutes played, not just the number of matches. I'd consider the various competitions involved like league games and cup matches.

There are pros and cons of playing U21, like maintaining form versus the risks of fatigue and injury. I’ll suggest alternatives like training or setting caps on match minutes based on recent performance. Finally, I can unify data among the teams and ask the user if they prefer opinion, data, or schedule.