《只有医生知道》是2013年江苏人民出版社出版的图书，作者是张羽。
只有医生知道管理治疗病人获得100%的氧气或空气。
Only the physician administering treatment knew whether the patients were receiving 100% oxygen or air.
当然，每只狗狗都天生不同，只有主人和宠物医生知道狗宝贝的食物过敏史、体重情况或其他健康问题，并依照这些因素指导狗狗的饮食。
Of course every dog is different and you and your vet know best if he or she has any food sensitivities, weight issues or other health concerns that should guide your dog's diet.
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