thereupon

1. ADV Thereupon means happening immediately after something else has happened and usually as a result of it. 随即; 于是[正式] [ADV with cl]

Some months ago angry demonstrators mounted a noisy demonstration beneath his window. His neighbours thereupon insisted upon more security. 几个月前，愤怒的示威者在他窗下发起了喧闹的抗议活动。随后他的邻居们就坚持要加强安保措施。