运动中突然膝盖疼表情痛苦图片

A Chinese runner experiences pain in his knee due to a meniscus injury, with red infrared thermal imaging highlighting the painful area on his knee joint. The image is extremely clean, with a completely white background, no background clutter, and no decorative lines. The composition is complete, with the lower body fully visible without cropping, a 3:4 aspect ratio, commercial photography style, and a medical education style.