It's important to be aware of the early warning signs and symptoms of cold exposure and how to prevent problems.

因此，注意寒冷暴露的早期迹象和症状警告以及如何预防问题显得十分重要。

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As a result, several patients with respiratory symptoms and a history of possible exposure to the avian virus are being evaluated as part of ongoing surveillance efforts.

因此，作为持续监测努力的一部分，正在对呈呼吸道症状并具有可能接触禽流感病毒史的若干病人进行评价。

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For every increase of exposure, we saw an increase in frequency and severity of the symptoms.

她在接受媒体采访时表示，“我们发现，随着接触的增加，这些症状的发病率和严重程度也在增加。”

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The people who initially came into contact with the letters showed no symptoms of exposure to the poison, but three officers who later examined the New York letter experienced minor symptoms that have since abated, police said.

WSJ: Union: NY mayor threats postmarked Shreveport, La.

Having access to this data is critical, particularly when patients present with conditions with which physicians may be unfamiliar, such as the symptoms of radiation exposure.

FORBES: Written By Arvind Subramanian

But members of the New York Police Department emergency service unit who came in contact with the letter that was opened at a city mail facility were examined for "minor symptoms" of ricin exposure that they experienced on Saturday, according to Paul Browne, NYPD spokesman.

WSJ: Letters to Mayor Bloomberg Tested Positive for Ricin