highly strung       
adjective UK uk/ˌhaɪ.li ˈstrʌŋ/ us/ˌhaɪ.li ˈstrʌŋ/ (US high-strung)
 紧张的;易生气的
very nervous and easily upset
  a highly strung young woman 神经紧张的年轻女子 
 a highly strung racehorse 易受惊的赛马 
 Synonyms: jittery jumpy nervy restive uptight