听力原文：W: So many people fear to talk about drugs. So professor, would you like to tell me what the real consequence of drug addiction is? M: Drug abuse can cause a wide variety of adverse physical reactions. Long-term drug use may damage the heart, liver, and brain. Drag abuses may suitor from malnutrition if they habitually forget to eat, cannot afford to buy food, or cat food lacking the proper vitamins and minerals. W: Drugs cost lots of money. It can push the family to the edge of breakdown. M: Yes, you are right. Drug abuse often casts the whole family into the abyss of agony. Individuals who abuse injectable drugs risk contracting infections such as hepatitis and HIV from dirty needles. One of the most dangerous effects of illegal drug use is drug overdosing, which may cause an individual to lose consciousness and to breathe inadequately. Without treatment, an individual may die from a drug overdose. W: What's the main feature of drug addiction? M: Drug addiction is marked by a compulsive craving for a substance. W: Is it true that there is no escape once you fall in the hand of drugs? M: Not exactly. Successful treatment methods include psychotherapy, and detoxification programs— medically supervised programs that gradually wean an individual from a drug over a period of days or weeks. Detoxification and psychotherapy are often used together. W: Why are so many young people go in for drags? M: Most of the young people go astray just out of curiosity, but some use drugs to relieve stress and to forget about their problems. Genetic factors may predispose other individuals to drug addiction. Environment factors such as peer pressure, and the availability of drugs, also influence people to abuse drugs. (23)