[单选题]对于外科感染特点的叙述，不正确的是( )
A.多数为单一细菌引起的感染
B.大多需手术或换药处理
C.分为特异性感染和非特异性感染
D.病变以局部炎症为主
E.多与创伤有关

Conventional wisdom has it that concern for the environment is a luxury only the rich world can afford; that only people whose basic needs for food and shelter have been met can start worrying about the health of the planet. This survey will argue that developing countries, too, should be thinking about the environment. True, in the rich countries a strong environmental movement did not emerge until long after they had become industrialized, a stage that many developing countries have yet to reach. And true. many of the developed world’s environmental concerns have little to do with immediate threats to its inhabitants’ well-being. People worry about whether carbon-dioxide emissions might lead to a warmer climate next century, or whether genetically engineered crops might have unforeseen consequences for the ecosystem. That is why, when rich world environmentalists’ campaign against pollution in poor countries, they are often accused of naivety. Such countries,
A. analyzing the difference between the environmental problems in rich and poor countries
B. arguing why developing countries should take immediate action to deal with their environmental problems
C. demonstrating how serious damage pollution can cause to a country’s economic development
D. explaining why the developed world’s environmental concerns have little to do with immediate threats