请解答上面的题目，给出通俗易懂的图形、动画解释，谢谢！---**Problem Title:** 重点例题 (Key Example Problem) **Problem Number:** 例4. (Example 4.) **Question Stem:** 如图23-2所示, 小羽和小秋在一个边长为100米的正方形跑道上跑步。小羽从A点出发, 沿逆时针方向跑, 小秋从C点出发, 沿逆时针方向同时起跑, 小羽的速度为7米/秒, 小秋的速度为5米/秒。他们折弯处都要停留5秒钟。那么, 当小羽第一次追上小秋时, 小秋跑了多少米? (As shown in Figure 23-2, Xiao Yu and Xiao Qiu are running on a square track with a side length of 100 meters. Xiao Yu starts from point A and runs counterclockwise. Xiao Qiu starts from point C and runs counterclockwise at the same time. Xiao Yu's speed is 7 m/s, and Xiao Qiu's speed is 5 m/s. They both stop for 5 seconds at each turn. So, when Xiao Yu catches up to Xiao Qiu for the first time, how many meters has Xiao Qiu run?) **Diagram Description:** * **Type:** Geometric figure representing a square track. * **Shape:** A square with vertices labeled A, B, C, D in counterclockwise order. * **Points:** Labeled vertices A, B, C, D. Xiao Yu's starting point is A, Xiao Qiu's starting point is C. * **Lines:** Straight line segments forming the sides of the square. * **Labels & Annotations:** "小羽" (Xiao Yu) near point A with a counterclockwise arrow. "小秋" (Xiao Qiu) near point C with a counterclockwise arrow. "图23-2" (Figure 23-2). * **Relative Position and Direction:** The vertices A, B, C, D are arranged counterclockwise. Both runners move in the counterclockwise direction. Xiao Yu starts at A, Xiao Qiu at C, meaning Xiao Qiu is initially ahead of Xiao Yu. **Solution Hint/Explanation:** 一点就通 (Key Insight/Easy to Understand) 由题意可知, 小秋在前, 小羽在后, 二人相距200米 (即追及与小秋要多拐两个弯, 即要多休息为200米) (From the problem description, it is known that Xiao Qiu is ahead, Xiao Yu is behind. The distance between them is 200 meters (i.e., catching up and Xiao Qiu needing to make two more turns, meaning needing to rest for 200 meters - Note: The phrasing regarding rest being 200 meters seems potentially inaccurate or unclear). The initial distance difference is 200 meters (two sides of the square)).