A、They are targeting at young people. B、They can lead to eating disorders. C、They can cure some skin problems. D、They are persua

Is food medicine? The question has never been so current. It’s clearly true that certain patterns of eating can sicken us and unfortunately, these are the patterns of eating that most people in developed countries now follow: low in vegetables and high in sugar, salt, refined oils and carbohydrates. Diet-related ill health, including heart disease and type 2 diabetes, now causes more deaths worldwide than tobacco. Some, therefore, conclude that there must be some specific and magical foods that might offer an outright antidote to whatever it is that ails us. Many of the loudest of these voices are traps. There are dark corners of the Internet promising that the right diet can cure autism or offer something close to eternal life, coupled with fabulous skin. Some of this woo is exposed in the new book The Angry Chef: Bad Science and the Truth about Healthy Eating by Anthony Warner. The Angry Chef points out that many "health-giving" diets are anything but leading to dangerously restrictive regimes that can easily tip over into eating disorders, especially for vulnerable young people.
   But it would be wrong to dismiss the idea that food and health are connected, just because of a few— OK, a lot—of the claims are not true. At this year’s Oxford Food Symposium, Canadian hospital chef Joshna Maharaj talked about the craziness of hospitals acting as if there is no connection between a patient’s health and what he or she eats. "Nourishment has long since been abandoned," Maharaj said. In 2011, she took over the catering for a Toronto hospital and was shocked to find that the kitchen used almost no fresh produce and did not even have a fridge in which to store vegetables. Sick people were served meatloaf so processed and oily that Maharaj "could not find the adjectives" to describe it. She retrained the chefs, found local suppliers and made the radical decision to serve wholesome, appetizing food for every meal. It was no surprise to her that patient morale and health substantially improved with the new menus.
   There are signs that many of us are sick of a medical system in which drugs are used—and not very effectively—to alleviate the symptoms of a bad diet. Wouldn’t it be better to try a way of eating that reduced your chances of getting ill in the first place?
Questions 19 to 22 are based on the recording you have just heard.
19. What does the speaker mainly talk about?
20. What does the speaker say about diet-related ill health?
21. What does The Angry Chef say about some Internet promising "health-giving" diets?
22. What does the example of Maharaj’s new menus for patients suggest?