[单项选择]ECT治疗前的准备不包括（）
A. 知情同意
B. 详细体格检查
C. 禁食禁水24小时
D. 治疗前8小时停用抗精神病药物及抗抑郁药物
E. 治疗前30分钟，注射阿托品0.5mg

The advantages and disadvantages of a large population have long been a subject of discussion among economists. It has been argued that the supply of good land is limited. To feed a large population, inferior land must be cultivated and the good land worked intensively. Thus, each person produces less and this means a lower average income than could be obtained with a smaller population. Other economists have argued that a large population gives more scope ]for specialization and the development of facilities such as ports, roads and railways, which are not likely to be built unless there is a big demand to justify them.
One of the difficulties in carrying out a world - wide birth control program lies in the fact that official attitudes to population growth vary from country to country depending on the level of industrial development and the availability of food and raw materials. In the developing country where a vastly expanded population is pressing hard upon the limit
A. agriculture
B. transport system
C. industry
D. national economy