True, cancer deaths have dropped chiefly because of long-delayed – and still poorly supported – efforts to curb smoking. Successes with screening and treatment of breast, colo-rectal, and cervical cancer have also helped.
诚然，死于癌症的人数量下降首先是因为控制吸烟—一项千呼万唤始出来，却仍然乏力的举措。在乳腺、肛肠和子宫颈癌的诊断和治疗方面的成功也助了一臂之力。