题目内容

Doctors usually treat individual patients one-on-one for a specific disease or injury. Public health professionals monitor and diagnose the health concerns of entire communities and promote healthy practices and behaviors to assure our populations stay ___________.

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Control of infectious diseases has resulted from clean water and improved sanitation. Infections such as typhoid and cholera transmitted by contaminated water, a major cause of illness and death early in the 20th century, have been reduced dramatically by improved sanitation. In addition, the discovery of ______________ therapy has been critical to successful public health efforts to control infections such as tuberculosis and sexually transmitted diseases (STDs).

Since 1900, safer and healthier foods have resulted from decreases in microbial contamination and increases in nutritional content. Identifying essential micronutrients and establishing food-fortification programs have almost ____________ major nutritional deficiency diseases such as rickets, goiter, and pellagra in the United States.

American Heritage Dictionary of the English Language (5th Edition, 2016) has defined "Public Health" as: "The science and practice of protecting and improving the health of a community, as by preventive medicine, health education, control of communicable diseases, application of sanitary measures, and _____________ of environmental hazards."

RandomHouseKernermanWebster'sCollegeDictionary(2010)hasdefined"PublicHealth"as:"Healthservicestoimproveandprotectcommunityhealth,esp.preventivemedicine,immunization,and _____________."