西甲第15轮观赛指南：皇马迎击塞尔塔；巴萨作客挑战贝蒂斯（西甲第15轮看点：皇马对阵塞尔塔，巴萨客战贝蒂斯）

Preparing match preview

I see the user's prompt is in Chinese, asking for a guide for La Liga Round 15 matches with Real Madrid vs Celta and Barcelona against Betis. It's possible these matches are either hypothetical or part of the 2025-26 season, and since today's date is December 27, 2025, I need to remain cautious about giving accurate details. The user might want info on schedule, kick-off times, broadcast channels, and team insights, but I need to avoid specific date-related info to prevent inaccuracies.Creating match preview

I should ask clarifying questions or provide a general preview, emphasizing that timings depend on the local region. I'll keep it concise, offering key watchpoints, expected starting XI based on typical rosters from the 2024-25 season, but since we're now at the end of 2025, those rosters might have changed. I need to avoid stating uncertain specifics as facts, so I can deliver a general analysis while suggesting they check for the latest injuries and lineups. For match details, I can provide a headline and suggest searching platforms for schedule details.Identifying key players and strategies

For this match, I’m focusing on key players for both teams. For Real Madrid, I’ll mention Bellingham, Vinícius Jr, and Rodrygo, while for Celta, Iago Aspas and potentially Strand Larsen stand out. I need to be careful referencing Kroos since he retired from club football after Euro 2024. Instead, I can list Tchouameni, Valverde, and Camavinga as midfielders. Defensively, Rüdiger is important too. For Barcelona vs Betis, I’ll note Barca’s away game style and key players, like Isco at Betis.Drafting match guide sections

I’ll create a structured guide without including external links or fabricated times. It’s important to ask the user if they want specific times or more in-depth details like predicted lineups and injuries. Since the message might simply be a headline, I need to present content effectively. I’ll draft sections for the guide, including an overview of the matches, key points for each team, and important matchups. I’ll also prepare a checklist for viewers to follow before the match starts. Lastly, any predicted scores will be marked as subjective to avoid speculation.