患者,男性,89岁,消瘦,卧床。护士巡视发现其骶尾部红、肿、硬结、有小水疱和上皮剥落,触痛,有渗液。判断该患者的情况是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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