某地十分貧困
John Snow - a historical giant in epidemiology某地十分貧困。 一日,村子裡來了一支扶貧工作隊。隊員們對村裡的一切事物都感到好奇,他們不住停下來,向村民們詢問。 大家來到一處茅屋前時,被一個奇怪的現象吸引住了目光。只見一老一小爺孫倆正在屋前曬太陽,老的大約60多歲,而小孩只有兩三歲光景。孫子把手伸進爺爺的褲襠裡,興致勃勃地搗鼓The life and times of Dr. John Snow (1813-1858), with multimedia pages including the complete text of On the Communication of Cholera. Created by the Department of Epidemiology, UCLA School of Public Health....
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