患儿,1岁8个月,上呼吸道感染。医嘱:小儿百服宁1/4片,q6h,pm;头孢唑啉钠,0.25g,im,2/d。门诊护士为该患儿肌内注射应选择( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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