1997年，行业刊物《药学信息》在全国范围内进行的一次调查表明，53%的药剂师承认在前两月里发生过差错。

In a 1997 nationwide survey conducted by the trade publication Drug Topics, 53 percent of pharmacists admitted having made errors in the preceding two months.

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本文介绍了通过建立数学模型、并采用CAD技术直接计算并生成避雷针保护范围，可以避免计算差错并明显的提高设计效率。

This paper will introduce how to build the mathematical models, and calculate the protection range of the lightning rods via CAD technology.

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目前对于数据差错的检查研究主要是检查数据的取值是否在有效的范围之内，或者随机抽查数据是否准确，但没有系统性地检查数据的准确性。

At present the research on database error check focus on whether the value is valid, or the data random check is accuracy. There is no systematic check for the data accuracy.

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