One day five years ago.

Outside the teaching building of Tokyo Women's Medical University, a young girl with a junior high school appearance stood under a tree, as if waiting for someone.

"Are you looking for me?" Suddenly, a question with a little smile came from her ear.

"Ah!" The girl was startled by the voice behind her, and then looked at the boy who suddenly appeared beside him with a surprising look.

"I probably didn't come late, right?" The boy had a faint smile on his face, and he glanced at the girl's chest that was still slightly raised despite being covered by her shirt.

"What are you looking at?" The girl's eyes were very sharp and she immediately saw the boy's gaze.

"Ah, no!" the young man explained hurriedly. "That was just a subconscious look at the direction of the sender - you didn't seem to have taken it off?"

"Well, I think this badge looks pretty good, so I stayed it," the girl looked at the badge on the chest of her shirt and raised her head again. "Anyway, your one has been cracked, and I am also down, so it's not a big problem for me to wear it."

As they talked and laughed at each other, the two walked into the teaching building - of course, they were not students of this university, especially the teenager could not be students of this university that did not start recruiting boys until the graduate school stage.

But they did get permission to listen to the lectures here.

...

"I..." After walking into the classroom through the door behind the classroom, the boy seemed a little uneasy. "Will it be too conspicuous if we sit in front? You should know that we are still children..."

"..." The girl stood there, thought for a while, and finally nodded. "Okay, I'll sit behind you, right? I'll do that, right?"

"Well..." The boy sat in the last row of chairs next to him with relief - behind him, the girl also breathed a sigh of relief.

This is a diagnostic course, that is, a course for cultivating triage doctors. This allows people who are listening to the class to basically understand how to deal with patients who are overtly treated with simple diseases in the shortest time, thereby reducing the work pressure of experienced doctors.

But the content of this course is obviously a bit different.

"Your teacher is sick today, so I will take up his course to give you a...small lecture - don't worry, the bill is out of the school." Gregory sat on a chair in front of the podium, looking at Qianyu and the others in the direction, and said at the same time. "I'll ask my question first - three people came to the outpatient clinic, and they all said that their legs hurt. What disease do they have?"

"It is usually a muscle strain. The standard response procedure should be to let him rest in bed and apply heat to the injured area." A female student in the front row replied.

"Well, it's usually the case," Gregory seemed very satisfied with the answer. "Statistically, more than half of the leg pain comes from muscle pain - usually caused by overwork, 12% from varicose veins caused by pregnancy, and the rest are basically caused by traffic accidents. In this way, the three of them have six legs, three of them were injured due to excessive jogging, two legs were damaged by a car, and the other was pregnant and diagnosed!"

A kind laughter rang out in the classroom, and the student scratched his head in shame.

"What do patients do when they are sick?" asked a male student - obviously, he is a graduate student.

"Don't know." Gregory shrugged.

"Didn't you ask about your medical history?" The male student was stunned.

"Of course I asked, but the problem is that we don't know what they did, we can only know what they said they were doing." Gregory explained. "Patient A, we can call him Uncle Farmer, he said that he suddenly felt his leg hurt while repairing the fence. Patient B, Cang Rose, she suddenly felt pain while pounced on the ball while playing volleyball. And Patient C, we call him handsome guy, he was injured while playing golf."

"In the next two hours, one of these three patients will be in danger of life, and another person will be kicked out because they are just to cheat anesthetics and get pleasure. Can you guess which one is it?"

"Uh..." The male student obviously planned to guess. "It should be that handsome guy, right? Uncle Farmer and Keng Qiang Rose are both physical professionals, and excessive use of anesthetics should affect their exercise function..."

"Calm down, I haven't even mentioned the symptoms yet," Gregory glanced at him and said. "Don't make arbitrary judgments before observing the condition, otherwise it will likely harm others and yourself--then next, I will play the role of the farmer first, and you will ask about my condition."

"When did it happen?" The male student was obviously very familiar with how to ask patients with pain to get the procedure.

"I suddenly started to hurt when I walked to the fence about half a mile from the farmhouse." Gregory replied.

“Is there any inducement to discover?”

No, I don't know anything.

"Can you describe the pain? How much area is covered?"

“It hurts from above my ankle.”

"What is the severity? If 1 is the lightest and 10 is the heaviest?"

"I'm not easy to say, but at least I haven't heard of it so much that I'm yelling out, so I want to...4?"

“How long has it lasted?”

"It's been there all the time." After Gregory said this, he looked at the male student, looking forward to whether he could ask for something that belonged to him outside the standard procedure.

"Do you have a family history?" The male student indeed raised the question he thought about after thinking about it, but...

"Of course, it's OK, but a family history of leg pain? This is rare. There should be only bone cancer, osteogenesis incompleteness and multiple myeloma, and the patient does not have it at home."

When the male student was silent, the female student expressed her opinion again. "Maybe it's a blood disease? We should be able to give him a blood routine (CBC) and a D-dimer test (check whether fibrinolysis occurs), and then add a PET scan... No, I think MRI may have better observation of vascular problems."

"Well, yes," Gregory nodded. "Then the patient died, thank you for your diligent autopsy."

"Ah?" the female student was stunned. "But... if we don't do these tests, we don't know what disease he has!"

"Of course we know what disease he has," Gregory sighed after saying this. "Don't you think the easiest way is to take a look at the patient's legs?"

"You didn't say it-ah, we didn't ask..." The male student then showed a sudden enlightenment expression.
Chapter completed!