室内访谈样本使用固定机位、窗边背景和一盏柔和的后景灯，画面重点落在说话者的表情。这个组合适合做对话基线：先固定构图，再只改变光线或景别。 An indoor interview sample uses a locked camera, a window background, and one soft practical light behind the subject. It is a useful dialogue baseline: lock the composition first, then change only lighting or shot size.