Pap smears work by detecting abnormal cells that are cancer precursors and that can be destroyed using techniques like lasers.

巴氏涂片可以检测异常细胞，这些细胞是癌症的前兆，可以使用激光等技术来摧毁它们。

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If the results are normal, Pap smears should be done every 3 years until age 30 years.

如果检查结果正常，建议每3年接受一次巴氏涂片检查，直至年满30岁。

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Women can stop having Pap smears at age 65 years if they have had routine screenings with normal results for the prior 10 years.

在前10年常规筛查中结果正常的女性可在年满65岁时停止巴氏涂片检查。

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Dr. Mamie Bowers, McKinney's gynecologist, says that reading Pap smears can be tricky.

NPR: Detecting High-Risk HPV in Older Women

In a pilot study, they analyzed Pap smears from 46 women who already were diagnosed with either ovarian or endometrial cancer.

NPR: Retooling Pap Test To Spot More Kinds Of Cancer

The list includes electrocardiograms for asymptomatic patients, imaging tests for routine back pain, and Pap smears for women younger than 21 years old.

CNN: Doctors and patients should talk more, test less