单选题 .    Scientists find that hard working people live much longer than average men and women. Career women are healthier than housewives. Evidence shows that people without a steady job are in poorer health than jobholders.
    Why is work good for people's health? It is because work keeps people busy away from loneliness. Researches show that people may feel unhappy, worried and lonely when they have nothing to do. Instead, the happiest are often those who are busy with their work. Many high achievers who love their careers feel that they are happiest when they are working hard. Work serves as a bridge between men and the world around them. By collective activity they find friendship and warmth. This is helpful and beneficial to health. The loss of work means the loss of everything. It affects one in spirit and emotion and is inclined to make him ill.
    Besides, work gives one a sense of fulfillment and a sense of achievement. Work makes one feel his value and status in society. When a writer finishes his writing or a doctor successfully operates on a patient or a teacher sees his students grow, they are happy beyond words and they may have a feeling of endless satisfaction.
    From the above we can come to the conclusion that the more you work, the happier and healthier you will be. Let us work hard and study and live a happy and healthy life.1.  Why are housewives not as healthy as career women? ______