For example, a grandmotherly woman staffing an animal rights booth at a recent street fair was distributing a brochure that encouraged readers not to use anything that comes from or is tested in animals — no meat, no fur, no medicines. Asked if she opposed immunizations, she wanted to know if vaccines come from animal research. When assured that they do, she replied, "Then I would have to say yes." Asked what will happen when epidemics return, she said, "Don't worry, scientists will find some way of using computers." Such well-meaning people just don't understand.

　　Scientists must communicate their message to the public in a compassionate, understandable way — in human terms, not in the language of molecular biology. We need to make clear the connection between animal research and a grandmother's hip replacement, a father's bypass operation, a baby's vaccinations, and even a pet's shots. To those who are unaware that animal research was needed to produce these treatments, as well as new treatments and vaccines, animal research seems wasteful at best and cruel at worst.

　　Much can be done. Scientists could "adopt" middle school classes and present their own research. They should be quick to respond to letters to the editor, lest animal rights misinformation go unchallenged and acquire a deceptive appearance of truth. Research institutions could be opened to tours, to show that laboratory animals receive humane care. Finally, because the ultimate stakeholders are patients, the health research community should actively recruit to its cause not only well-known personalities such as Stephen Cooper, who has made courageous statements about the value of animal research, but all who receive medical treatment. If good people do nothing, there is a real possibility that an uninformed citizenry will extinguish the precious embers of medical progress.

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46. The author begins his article with Edmund Burke's words to ________. 　　[A] call on scientists to take some actions 　　[B] criticize the misguided cause of animal rights 　　[C] warn of the doom of biomedical research 　　[D] show the triumph of the animal rights movement

47. Misled people tend to think that using an animal in research is ________. 　　[A] cruel but natural 　　[B] inhuman and unacceptable 　　[C] inevitable but vicious 　　[D] pointless and wasteful

48. The example of the grandmotherly woman is used to show the public's ________. 　　[A] discontent with animal research 　　[B] ignorance about medical science 　　[C] indifference to epidemics 　　[D] anxiety about animal rights

49. The author believes that, in face of the challenge from animal rights advocates, scientists should ________. 　　[A] communicate more with the public 　　[B] employ hi-tech means in research 　　[C] feel no shame for their cause 　　[D] strive to develop new cures

50. From the text we learn that Stephen Cooper is ________. 　　[A] a well-known humanist 　　[B] a medical practitioner 　　[C] an enthusiast in animal rights 　　[D] a supporter of animal research