单项选择题
A．to help patients recover B．to increase the number of heart surgeries C．to get back the money spent on the equipment D．to buy new equipment for the treatment of heart disease
A．It has reduced the costs of medical treatment. B．It has helped save the lives of most patients. C．It has encouraged doctors to do more heart surgeries. D．It have helped educate people about the prevention of heart disease.
A．The Greatest Killer in the West B．Heart Disease: Treat or Prevent C．Modern Technology and Heart Surgery D．Heart Surgery: Advantage and Disadvantages