As long as they are scratched or bitten by animals such as cats and dogs, they must go to the hospital for vaccination with rabies within 24 hours, regardless of whether or not they are bleeding. Don't be lucky. Cats and dogs are the most agitated in summer and most likely to bite people. It is also easy to be bitten by firecrackers during the period. Based on the above statement, which of the following can be derived? ? ['If you are scratched by a cat or dog but there is no bleeding, do not go to the hospital for rabies vaccine.', "Don't go to the hospital to get rabies vaccine if you are bitten by a dog that doesn't have rabies virus.", 'If it is not necessary to go to the hospital to inject rabies vaccine, you must not have been scratched or bitten by the animal.', "If you haven't been to the hospital to get rabies vaccine, you must not have been scratched or bitten by the animal."]