"Matching methods can be a powerful tool when randomization is not possible."

To go global, Chinese fruits must first solve the standardization problem.

The past is not dead; it is not even past.

The deepest urge in human nature is the desire to be important.

【解释】脑力劳动者统治人，体力劳动者被人统治；被统治者养活别人，统治者靠别人养活，这是通行天下的原则。