In today's lecture, we're discussing the impact of urban green spaces on mental health. A recent study from the University of Melbourne followed 1,000 adults over five years. Participants who lived within 300 meters of a park reported 20% lower stress levels. Interestingly, the type of greenery mattered: tree density had a stronger effect than open lawns. The study also found that visiting green spaces at least twice a week, for 30 minutes each time, was linked to better mood, but only if the visit involved physical activity like walking or cycling. Passive sitting had little benefit.
❓ 根据讲座内容，研究发现了绿地效应的哪些方面？
A. A. 居住在靠近任何类型的绿色空间都能同样地减轻压力。
B. B. 树木密度对缓解压力的影响大于开阔草坪。
C. C. 每周访问一次绿色空间，每次30分钟，就足以改善情绪。
D. D. 在绿色空间中静坐比进行身体活动更有益处。
✅ 正确答案
B. Tree density had a greater impact on stress reduction than open lawns.