名词
中文翻译：过敏反应
同义词：
['hypersensitivity', 'allergy']
例句：
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1. She was allergic to cats and avoided them at all times.
她对猫过敏，总是尽量避免接触。
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2. The doctor diagnosed her with a food allergy after the reaction.
医生诊断出她对某种食物过敏后进行了治疗。
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3. Allergies can cause severe symptoms like hives or difficulty breathing.
过敏反应可能导致严重的症状，如荨麻疹或呼吸困难。