单项选择题A．To show people how to get their lives back to normal. B．To show how difficult it is for people to lose weight. C．To remind people to check the calories on food bags. D．To illustrate how easily people abandon their goals.

单项选择题A．By doing odd jobs at weekends. B．By working long hours every day. C．By putting in more hours each week. D．By taking shorter vacations each year.