Presenile: refers to the phenomenon of premature aging due to huge life and work pressure, young people's psychological age aging, negative mentality, and physical decline. Which of the following is senile? ["Xiao Yuan is less than 35 years old. Because of his long-term liking to cross Erlang's legs, he has caused a bent hump, causing the lumbar and thoracic spine to compress the spinal nerves.", 'er B.80, Xiao Chen is the vice president of the company. Although the scenery is unlimited outside, he often talks at home. At the computer, the pillows are full of refreshing drugs.', 'Xiao Wu just turned 40 and suffered from constipation three years ago. In addition to the dull complexion and spotted acne, abdominal fat also increased day by day, and waist circumference became larger and larger.', "Mr. Wu learned that the subcutaneous tissue began to shrink, and according to the doctor's advice, he insisted on washing his face with warm water every day and applying moisturizer when the skin was slightly wet."]