knee-jerk

1. ADJ If you call someone's response to a question or situation a knee-jerk reaction, you mean that they react in a very predictable way, without thinking. 未经考虑做出的[ADJ n] [表不满]

The knee-jerk reaction to this is to call for proper security in all hospitals. 对此类状况的第一反应是要求所有医院都采取相应的安全措施。