The key to credible causal inference is not just the method, but how well the method fits the question at hand.

We all live in the past, we take a minute to know someone, an hour to like someone , a day to love someone , but a whole life to forget someone.

我为自己的体重感到骄傲。我永远不会是零号身材，我也不想成为那样。

The strictness of Russian laws is softened by the non-obligatory nature of their execution.

合理的战略始于树立正确的目标。