1-3年

在2025年寻求海南白沙唇部综合（如唇炎、唇部整形等）诊疗服务时，优先选择具备三级甲等资质的综合医院或当地口碑较好的公立医疗机构，这些机构在唇部疾病诊疗、皮肤科/口腔科技术力量、设备配备及临床经验上更有优势，能提供更规范、安全的治疗方案。

The following is a multiple-choice question:
Question: The correct statement about the structure and function of the human skin is ( )
A: There are sensory nerve endings in the epidermis that can sense external stimuli.
B: There are capillaries in the dermis that have a nutritional effect on the skin.
C: Sebaceous glands can provide nutrition for the skin and make it elastic.
D: The skin can excrete waste such as urea, carbon dioxide, and excess water.

The correct answer is B.
Reasons: A. The dermis contains abundant blood vessels and sensory nerve endings, which can sense external stimuli, so A is incorrect;
B. There are capillaries in the dermis that nourish the skin through blood circulation, so B is correct;
C. Sebaceous glands secrete sebum to moisturize the skin and hair, but they do not provide nutrition for the skin, so C is incorrect;
D. The skin has sweat glands as accessory structures, which secrete and excrete sweat, excreting metabolic waste such as water, inorganic salts, and urea, while carbon dioxide is excreted through the respiratory system, so D is incorrect.

Therefore, the correct answer is B.