阅读理解 There are three branches of medicine. One is called 'doctor medicine' or 'scientific medicine'. Scientific doctors try to observe sickness,  look for logical pattern,  and then find out how the human body works. From there they figure out what treatments may work. This kind of medicine is believed to date from the 4th century BC. Although nowadays it is successful,  in the ancient this approach(方 法) probably did not cure many patients. The second kind of medicine is called 'natural cures' or 'folk medicine',  in which less educated people try to cure sickness with various herbs(中草药). These folk healers also use observation and logic,  but they are not so aware of it. They try things until they find something that seems to work, and then they keep doing that. Folk medicine flourished(兴起) long before the development of scientific medicine and was more successful in ancient times. The third kind is called 'health spas' or 'faith healing'. Sometimes this may be as as touching the holy man and being immediately healed. Other times,  a magician may make you a magic charm, or say a spell(咒语),  to cure you. Some religious groups organize healing shrines(圣坛) for the sick. In these places people rest,  get plenty of sleep,  eat healthy food,  drink water instead of wine,  and exercise in various ways. They also talk to the priests(牧师) and pray to the gods. If you are feeling depressed or you have been working too hard,  going to these places may be just the right thing to make you feel better. 1. Doctor medicine_________. A. has a longer history than folk medicine B. has been practiced for around 2, 400 years C. bases its treatments on observation and logic D. was very successful in curing sicknesses in ancient times 2. According to the passage,  which of the following is NOT used in health spas? A. Magic power B. Various herbs C. Religious faith D. A healthy life style 3. According to the passage, which of the following statements is true? A. Folk healers choose different herbs to cure diseases without any sound basis. B. People who practice folk medicine need lots of formal education on herbs. C.The success of folk medic ine led to the development of doctor medicine. D.Natural cures worked better than scientific medicine in ancient times. 4. The author's primary purpose in this passage is to_______________. A. describe different types of medicine B. argue for the importance of medicine in health care C.show the important role religion plays in medical treatments D.compare the educational background of three different types of patients