Let bo be the abscissa, especially the ordinate. Since we seek knowledge, we must strive for horizontal length, and since we seek expertise, we must strive for vertical length. The length depends on the degree of specialization. If you want to save time and effort, how can you specialize? Why are you afraid of wasting time and effort when seeking knowledge and expertise? Moreover, how much time has been spent on the horizontal length and how much time has been spent on the vertical length is inconclusive. How do you know if the horizontal length will be too long? In short, it is completely ignorant to put forward this argument!