A: The three top priorities concerning drinking water and sanitation during an emergency situation are.
答：在紧急情况期间有关饮用水和卫生设施的三项最优先重点为。
Based on the comprehensive analysis of the present environmental situation and the existing problems, the countermeasures of protecting drinking water sources in Ba nan district were proposed.
在全面分析巴南区城镇饮用水源地的环境现状及存在问题的基础上，提出了改善巴南区城镇饮用水源地环境的对策。
To protect the drinking water sources environment, the present environment situation of 18 centralized urban drinking water sources in Banan district were investigated.
从保护巴南区饮用水源地环境的角度出发，首次对巴南区18个集中式城镇饮用水源地的环境现状进行了调查研究。
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