欧洲开始担忧了，乌克兰没人战斗了，往后该怎么办？

Group 1 - The article discusses the ongoing discussions among the US, Russia, Europe, and Ukraine regarding the Ukraine crisis, highlighting that Ukraine is set to become a frontline in Europe’s defense against Russia, symbolizing a new chapter in European defense autonomy [2] - The EU's "Defense Preparedness Roadmap 2030" aims for full readiness by 2030, with Ukraine playing a crucial role in the European defense system, particularly in the event of renewed conflict [2] - Ukraine's population has significantly decreased from a pre-war figure of 42 million to an estimated 25 to 31 million in government-controlled areas, primarily due to war casualties and emigration [4] Group 2 - Ukraine's GDP has decreased by 40% compared to pre-war levels, severely impacting public services, including education, and creating a labor market crisis with many job vacancies [6] - The article raises concerns about the reluctance of European countries to accept Ukrainian refugees, as this poses financial and social stability challenges for Europe [8] - The severe demographic imbalance in Ukraine raises questions about its future labor force and the potential for social issues, complicating the situation for NATO's involvement in Ukraine [9]