随机实验是因果推理的黄金标准，但它们并不总是可行的。
"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
Success in the energy sector is not just about extracting resources, but about doing it responsibly and sustainably.
Sustainability isn't a trend—it's the foundation of responsible business.
Gratitude turns what we have into enough.
简单生活，高尚思考：这是通往真正幸福的道路。