the fact of taking action straight away 迅速性: 立即采取行动He responded to our email questions with great promptness. 他非常迅速地回复了我们的电子邮件问题。
the quality or habit of arriving somewhere at the right time synonym punctuality及时性: 在正确的时间到达某个地方的质量或习惯There was one rule her father insisted on: promptness. 她父亲坚持一条规则:准时。