A math problem for a middle school child that I couldn't solve after looking at it for a long time.

Older women looking for younger partners actually carry quite a bit of risk. Last night, while having dinner with friends, there was an older woman who talked about her ex-young partner, crying uncontrollably. This woman is a doctor with a PhD, and she is quite older, at 37 years old. She is a local native from a provincial capital city, and her parents are also civil servants. She is an only child, and her family background is decent but not overly wealthy. The man she was with is a "Phoenix man" from a smaller city, four years younger than her. He also has a PhD, and they met when he was doing his residency at her hospital. As they gradually got to know each other, they ended up together. After they got together, the man made it clear that his family couldn't afford to buy a house, so he suggested that the woman buy one, and it had to be a big house. At that time, the woman was already infatuated; she thought she had found a younger partner and felt responsible for taking care of him. So, she sold her own house and bought a larger one, only to end up purchasing it at the peak of the housing market. After she got the big house, she wanted to marry the man, but he then played games, saying that since she was older, they would only marry if she could get pregnant. Later on, she actually succeeded in getting pregnant. After she got pregnant, the man agreed to let their parents meet. However, during the meeting, his parents looked down on her, saying their son had great prospects and many leaders were eager to introduce their daughters to him. They claimed he was blind for choosing her, so they had no dowry, no wedding house, nothing at all; everything had to come from her. This infuriated her parents. But the woman still insisted on being with this man, completely infatuated. Eventually, after some reluctance, her parents agreed, but then the man brought up the issue of a dowry, saying he wouldn't agree otherwise. This made the woman furious, and in a fit of anger, she lost the baby. After the loss, the man, who had initially been supportive of marrying her, changed his mind and insisted on breaking up. The woman clung to him for several months, but he remained firm on the breakup. Matching social status is still quite important.

What are the signs before dying from staying up late? There was a subcontractor I worked with before, a 28-year-old guy with a really good temper. His uncle brought him into the scaffolding rental business, but later his uncle's biological son came along, and he was gradually pushed out to start his own thing. To get work, he would go around giving gifts and drinking, pouring all his earnings into it. At home, his wife took care of the kids, and it all depended on him. One time at a dinner, I asked him, "With all this eating and drinking, can your body handle it?" He chuckled and said, "My whole family relies on me; I can't spend money recklessly." On the day of the incident, he came to discuss something with me. As soon as he walked in, he seemed really agitated, pacing back and forth, saying he felt uncomfortable in his chest. When I looked up, I was shocked—his eyes were as red as if he were bleeding. I quickly had the foreman drive him to a top-tier hospital. The foreman later said that as soon as they entered the hospital, he collapsed. The diagnosis was aortic dissection. He was lucky; being young helped him survive the emergency. Later, I found out he had been diagnosed with high blood pressure long ago but thought he felt fine and never took medication. He survived, but all his savings went into medical bills, and his health deteriorated. He lay in the ICU for a long time, and when he came out, he had several scars on his chest. Two years later, he still gasped for breath while walking, curled up on the sofa at home soaking his feet, and could no longer work. His wife had no choice but to leave the kids and come to the construction site to cook. Eventually, we slowly lost contact. The body doesn't suddenly break down; it only reminds you step by step, but you just don't take it seriously.