【单选题】A 72-year-old woman, who lost 50 lb (22.7 kg) of weight in the past year, visited her physician complaining of abdominal cramps, pain, and vomiting. Physical examination detected a distended abdomen w...
【单选题】When some nineteenth-century New Yorkers said 'Harlem', they meant almost all of Manhattan above Eighty-sixth Street. Toward the end of the century, however, a group of citizens in upper Manhattan—wan...