Chapter 157: The real purpose is revealed Xu Qingzhou: “.” Is this what it feels like to shoot yourself in the foot? It hurts so damn much. "No, I just happened to meet you." Xu Qingzhou denied it flatly. The second cup of milk tea tasted better than the previous one, although it was a bit bloating. Song Yao nodded, stared at him, and asked again: "Such a beautiful girl took the initiative to show her affection to you, don't you have any feelings in your heart?" Haha, you’re starting to hurt my heart. Xu Qingzhou shook his head decisively and said, "No." Song Yao retracted her gaze and walked towards the community. As they walked on the road, their shadows under the street lights stretched out and intertwined. Soon, they arrived at the gate of Song Yao's community. Before leaving, Xu Qingzhou was a little curious and said boldly: "What if I really feel a little moved?"
"What does it have to do with me whether you are moved or not?" Song Yao squinted at him and thought to herself, if Xu Qingzhou really did this, should she beat him so hard that he couldn't take care of himself, or just throw him into the river. Xu Qingzhou laughed dryly and couldn't help but tighten his clothes. Just now, his back suddenly felt a little cold. What happened? Well, don’t ask such dangerous questions next time. Song family. Song Yao returned home, said hello to Song Shisong and the others, said she was a little tired from shopping, and went straight back to the house. Zhang Junli and Song Shisong looked at each other and shook their heads helplessly. After returning, they also asked their daughter what the relationship between her and Xu Qingzhou was and whether they were already together. But the daughter denied it, saying that she and Xu Qingzhou were just ordinary friends. Zhang Junli hesitated for a moment and asked Song Shisong: "How about I go and ask again?" "Forget it, let these two young people solve their own problems." Song Shisong smiled lightly. Zhang Junli said unhappily, "You are so careless. What if your daughter gets bullied?" "Bully? You mean Xiao Xu?" Song Shisong laughed dumbly, recalling the scene of dinner that day, "I think it's good enough that our daughter doesn't bully others." Zhang Junli couldn't help but laugh. There was really nothing wrong with this sentence. She knew her daughter very well and knew she was quite capable of fighting. In the bedroom, Song Yao sat in front of the desk in a daze, but had no interest in reading. This guy is so irritating, he's still thinking about falling in love? The more Song Yao thought about it, the angrier she got. She picked up the doll that Xu Qingzhou had caught nearby and punched it twice. After that, she snorted in relief and continued to read with her head down. Another two days passed and it was the weekend. Xu Qingzhou has been staying at home reading books and studying the twin prime conjecture. Occasionally, he moves a rattan chair to the balcony to drink tea and bask in the sun. He lives a pretty comfortable life. It's 3 o'clock in the afternoon. Xu Qingzhou was lying on a rattan chair, squinting his eyes in the sun. After a while, he picked up his phone to check the group messages. During this period, the hottest topic everyone was discussing was the MCM competition.
The Kyoto University team chose Question A, and the English version of the original question is available in the group. 【PROBLEM A: Eradicating Ebola The world medical association has announced that their new medication could stop】 This is a question of eradicating Ebola. Basically, it is to build a realistic, reasonable and useful model that takes into account the spread of the disease, the amount of drug needed, possible delivery systems, delivery locations, etc. Xu Qingzhou lost interest after taking a look at it. This question was not difficult. It required the use of the classic SIR (Susceptible-Infected-Removed) model as a basis. However, the whole process was rather complicated and required the cooperation of three people. In the professional group, Kong Xianbo, Liang Quanjie, and Shao Jiuming were having a heated discussion. Kong Xianbo: "I think we need to add the Exposed (E) status. After being infected with the virus, the body will not show symptoms immediately, but it is already contagious." Liang Quanjie: "The main thing is to add the status of critical patients (Critical, C) and dead patients (Dead, D)." Shao Jiuming: "I have read the papers on Topic A in previous ACM competitions. In fact, it is not that simple. Basically, they will build a variant model of SIR, such as SEIRCD model." "The growth rate of the infected population is equal to the rate at which exposed people become infected, [\frac{dI}{dt}=\sigma E -(\ga" Zhang Shuyi: "Wow, you are all so amazing." Kyoto, in a room in a courtyard. Xu Zhengyang looked at the discussion on the screen with Lao Kong and others who were pretending to be cool, snorted coldly, and then typed: "Lao Xu, what do you think?" As a result, the group fell into silence. Thousands of kilometers away, Xu Qingzhou laughed and thought to himself, "Old Xu, you are still showing off for your adoptive father even though we are so far apart. I am sorry to trouble you." "Come in and have some fruit." Wang Xiaping's voice came from the living room. "coming." Xu Qingzhou stood up. The old couple were watching TV in the living room with a fruit plate on the table. Looking at her son, Wang Xiaping said disdainfully: "All you do is lie on a chair and bask in the sun. I think you shouldn't be here. You should hang out with the old men and women in the community." "Mom, you change your attitude so quickly. A few days ago, you told me not to be so busy." Xu Qingzhou sat down on the sofa. As soon as he stretched out his hand, Wang Xiaping slapped it away, "Go wash your hands." Xu Qingzhou washed his hands happily, came back, peeled an orange, and handed it to Ms. Wang and Old Xu. Seeing them shaking their heads, he ate it himself, smacking his lips at the same time: "It's still so comfortable at home." "Oh, you're at home and everything's fine, why would you wait until the 20th of the twelfth lunar month to come back?" Wang Xiaping rolled her eyes at him and said unhappily, "You're so busy at such a young age." Xu Shouyun was watching the game with his legs crossed. Without even turning his head, he said, "I support Qingzhou on this point. As a boy, career is the most important thing." "Haha, that's it for now, but I'll have to wait for it later." Wang Xiaping sighed and frowned: "Look at the son of the Zhang family. He hasn't come back to celebrate the New Year for three or four years. Every time during the New Year, the old couple is alone." Xu Qingzhou raised his eyebrows and wisely remained silent, feeling that the old couple had other intentions than drinking. "I heard from Old Zhang that his son will be back this year." Xu Shouyun took a sip of tea. "He said he would come back last year." Wang Xiaping didn't believe it. She paused, sighed again, and said, "It's probably because I don't have any grandchildren. Otherwise, it wouldn't be so lonely." "That's true." Xu Shouyun nodded in agreement.
Haha, the truth is revealed. Xu Qingzhou broke off two slices of orange and threw them into his mouth, still not responding. Wang Xiaping continued to nag: "And there's the son of the old Wang family. He's almost 30, and he's still hanging around outside all day, and he hasn't even found a partner." "It's hard to find it now." Xu Shouyun sighed. When Wang Xiaping spoke, she glanced at Xu Qingzhou and said, "Yes, I used to have high standards. When I was 18 or 19, I said I was not in a hurry, but now I am still single." Xu Qingzhou: “.” This fruit tastes bland. (End of this chapter)