responsiveness

医生测试了病人对疼痛刺激的敏感性。

The doctor tested the patient's ___responsiveness to pain stimuli.

这款游戏手柄的快速响应让操作更加精准。

The game controller's ___responsiveness allows for more precise movements.

客户对这家公司客服的快速响应非常满意。

Customers are very satisfied with the ___responsiveness of this company's customer service.