自１９９０年开始，常熟市连续五年发现了几处有残存钉螺的螺点（区）。根据螺点（区）的环境类型和特点，我们制订了不同方案，实行多种灭螺方法并用的综合性措施，及时进行扩大范围药物灭螺，做到当年有螺当年灭光。现将灭螺效果作一评价：１残存钉螺概况五年内，全市查... Since 1990, Changshu City, for five consecutive years found a few snail remnants of snails (area). According to the environment and characteristics of the snail point (area), we have formulated different plans and implemented a variety of measures to eliminate snails and used them in a timely manner to expand the scope of the drug snail. Now the snail effect for a evaluation: a residual snail profile within five years, the city check ...