This question tests students’ self-rescue awareness and ability. According to the textbook, when symptoms of food poisoning occur or chemicals are accidentally ingested, chopsticks or fingers should be reached deep into the throat to stimulate the back wall of the pharynx and the base of the tongue to induce vomiting. When the poisoned person is unconscious, others need to help induce vomiting and seek medical attention promptly. Therefore, A is consistent with the meaning of the question; other options are inconsistent with the meaning of the question.

Therefore choose A.