成语出处：战国·列子《列子·天瑞》：“杞国有人忧天地崩坠，身亡所寄，废寝食者。”[1]【解释】杞：周代诸侯国名，在今山东新泰一带。忧天：担心天会掉下来。老是怕天塌下来，以至于吃不下饭睡不好觉。比喻不必要或缺乏根据的忧虑和担心。
unfounded
alarmist
Man in Qi who worried that the sky is falling down.
groundless worry
Meet troubles half-way
They are typically pessimistic. They like to meet trouble halfway.
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