Translate the following passage from Text B into Chinese.Nowadays fibre is considered to be an essential part of a healthy diet. A lot of fibre is found in unprocessed flour and in many vegetables. However, the fibre has been removed in foods like white bread. In some countries where the national diet contains large quantities of unrefined flour and vegetables, certain diseases are comparatively rare. That is why modern experts on “healthy eating” place a lot of emphasis on the eating of vegetables.