r. with little or no delay
r. in a punctual manner
r. at once (usually modifies an undesirable occurrence)
adv. 敏捷地, 迅速地
1. She always arrives at work promptly at 9 AM.
她总是准时在早上9点到达工作岗位。
2. Please respond to the email promptly to avoid any delays.
请及时回复邮件，以避免任何延误。
3. The train left promptly at the scheduled time.
火车在预定时间准时出发。