根据用户提交的搜索参数，使用迭代方式构建查询，并将查询限制到那些可以在当前日期内有效显示的已批准清单。

Construct this query iteratively, depending on the search parameters submitted by the user, and restrict it to only those approved listings that are valid for display on the current date.

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诺华自己的研究显示，在消除女性便秘相关的肠易激综合征的症状时仅有5%到10%比安慰剂更有效。

Novartis's own studies show that it is only 5 percent to 10 percent more effective than placebos at resolving the symptoms of constipation-related irritable bowel syndrome in women.

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实验结果表明：现有算法以16%的有效扩展规则覆盖了93%的标注正例，并使预期精度从51%提高到81%，显示了这套规则学习和评价方法的有效性。

Test results indicate that the algorithm can acquire about 16% of the useful expanded rules to cover 93% of the annotated positive examples and can improve the expected accuracy from 51% to 81%.

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