Due to the widespread of this medical technology，more diseases can be discovered and treated at an early stage.
A. presentation
B. application
C. qualification
D. appreciation
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A. presentation
(答案→)B. application
C. qualification
D. appreciation
解析：A．presentation呈现，B．application申请，运用，C．qualification资格，资历，D．appreciation欣赏，感激，句意：由于这个医学科技的广泛使用，更多的疾病在早期被发现被治疗。根据句意选B。