资料来源 : pyDict

大惊小怪者,杞人忧天者

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Alarmist \A*larm"ist\, n. [Cf. F. alarmiste.]
   One prone to sound or excite alarms, especially, needless
   alarms. --Macaulay.

资料来源 : WordNet®

alarmist
     n : a person who alarms others needlessly