To evaluate and compare the methods of epidemiologic clue investigation with the sample investigation in blindness and low vision.

目的：对盲与低力流行病线索与抽样调查方法进行比较、评价。

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By the analysis on the sample investigation data, this paper taking the female labor in rural as research object studied the female labor's outgoing of Subei rural carefully.

本文选择了苏北地区女性作为研究对象，通过对抽样调查数据的计量分析，对苏北地区农村女性劳动力的外出现象进行了深入细致的研究。

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This paper proposes a conceptual model with information overload as an intervening variable and some operational variables to conduct sample investigation and statistical analysis.

本文提出了一个以信息过载为中介变量的概念模型，并设置操作变量选择样本进行调查和统计分析。

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"This is probably the only definitely habitable environment that we've described and recorded, " said Paul Mahaffy, principal investigator for Curiosity's Sample Analysis at Mars investigation at NASA's Goddard Space Flight Center.

CNN: NASA: Yes, Mars could have hosted life

The swimmer who, under her maiden name Michelle Smith, won three gold medals at the 1996 Olympic Games, is under investigation by International Swimming Federation after it said the doping sample taken in November last year showed clear signs of contamination.

BBC: Irish swimmer denies drugs claims

Its investigation focused on 600 of the most serious complaints, and a sample audit of suspect votes at 3, 377 polling stations.

BBC: Afghan election goes to run-off