她采用梯式投资法，将存款分散到不同期限的定期存款中。

She uses ___laddering by spreading her savings across CDs with different maturity dates.

研究者采用阶梯式提问法，通过层层深入的问题来挖掘受访者的真实想法。

The researcher employed ___laddering by asking follow-up questions to uncover the participant's deeper beliefs.

他通过不断学习新技能，一步步在职业阶梯上攀升。

He keeps ___climbing up the career hierarchy by learning new skills.