The secretary problem is a very typical and interested optimal stop problem. In this paper we give a primary solution about secretary problem by formula of total probability.

秘书问题是典型而又有趣的一类最优停止问题。本文用全概率公式给出秘书问题的一种初等解法。

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This article deals with a natural variation of the classical secretary problem called the group interview problem, in which each group contains several alternatives and each group of alternatives .

本文主要讨论秘书问题的变形——“组面试问题”在目标是选择最优或次优时的最佳选择策略（停止规则），采用的主要方法是后退归纳法和边界阶段方法。

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"We have a robust safety and security strategy," Home Secretary Theresa May said this month when announcing a set of exercises to simulate possible problem scenarios.

“我们有一套强健的安全和治安策略，”内政大臣特丽莎·梅说，本月将会宣布一系列演习，模仿可能会出现的问题场面。

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In Washington, Health and Human Services Secretary Kathleen Sebelius said the problem was not getting enough supplies to Haiti.

VOA: special.2010.02.01

Ray LaHood, Secretary of the U.S.Department of Transportation, says distracted driving is a critical problem.

VOA: standard.2010.06.24

While the Obama administration is critical of the new law, Homeland Security Secretary and former Arizona Governor Janet Napolitano says she understands why Arizona residents are so frustrated with the problem of immigration.

VOA: standard.2010.05.08

Still, Health and Human Services Secretary Michael Leavitt sees a problem.

NPR: Medicare Money Problems Trigger Warning

Local EIS secretary Andrew Stewart said the basic problem was that the contract focused on financial considerations not educational ones and consultation with schools was inadequate.

BBC: Highland Council criticises IT contractor Fujitsu

Education Secretary Michael Gove said that the problem was not "elitism or snobbery" but a lack of honesty in higher education about "the subject and qualification choices which prepare students best for university study".

BBC: 'Unfair' university admissions claim