问题: 某病人因长期卧床,骶尾部皮肤红肿、破溃,护士给予红外线灯照射创面,灯距和照射时间为
A: 30-50cm,20-30min
B:30-50cm,30-60min
C:50-60cm,20-30min
D:50-60cm,30-60min
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