It is the prevention of disease its successful treatment that has led to the rapid increase of the world’s population.
A. rather than
B. less than
C. in addition to
D. in the direction of
网友回答
(答案→)A. rather than
B. less than
C. in addition to
D. in the direction of
解析：短语辨析。rather than而不是；less than 少于； in addition to 除……之外；in the direction of朝……方向。句意：是疾病的预防而不是成功的治疗疾病导致了世界人口的快速增长。故选A。