写实风格科研人员实验室手持黄色液体试管专注实验场景

realistic scientific laboratory scene, a scientist wearing a white lab coat and white latex gloves holding a transparent glass test tube with two-thirds filled pale yellow liquid, tube has scale marks and smooth surface reflecting light, hands holding the tube steadily in the center of the frame with a slight tilt, shallow depth of field with blurred background in cool blue-gray tones, professional and precise atmosphere, soft and even lighting, detailed and clear, conveying a sense of rigor, professionalism, and scientific exploration