In mathematics, the simplest questions often lead to the deepest insights.
On the path of science, there are no smooth roads to take; only those who are not afraid of hard work and climb the steep mountain paths have the hope of reaching the glorious summit.
如果你不犯错误，说明你不够努力。
追求知识是一段永无止境的旅程，每一个发现都为新的问题打开了大门。
Success is not about perfection, but about continuous improvement and adaptation to change.
Natural experiments are a powerful tool for understanding causal relationships in the real world.