Based on this common sense, it can only be said that the rabbit and the tortoise passed through an infinite number of tortoise starting points when they met. Achilles said that it takes countless points to meet. He regards this infinite number of points as real number points that cannot be realized. To sum up: A thinks that infinite points cannot be reached, and on this basis, it can only approach this point infinitely. The fact is that an infinite number of points are easy to reach. Not good enough, but I definitely came up with it. I hope the landlord will adopt it. Besides, I like this kind of question very much. If there is, we can learn from each other.