"..."
Yan Yundang stared at Li Ang, who was calm and calm, and suddenly smiled and said: "It's interesting. Are you a doctor?"
The housekeeper on the side was shocked when he saw Li Ang put on a wolf hair beard on himself. He was afraid that Li Ang would say something weird and make Yan Yun Dang angry, so he quickly said: "Little Prince Li Ang is a candidate of this year's Academy, and he came in second in the preliminary examination. Imperial science, arithmetic, painting, and herbal medicine are all above grade A."
"oh?"
Yan's father and son raised their eyebrows at the same time. Yan Yundang looked Li Ang up and down and said solemnly: "It's just herbal medicine. With your body, can you be ranked first in the imperial department?"
Is there no one left in the Yu State Military Mansion? "
"hehe."
Li Ang smiled slightly, "Yuke pays attention to the unity of man and horse. The bay red horse and I won the first class together."
"Well..."
Yan Lin groaned, riding horses all year round would inevitably leave marks on his hands and legs. Li Ang didn't look like he could beat those barbarian youths who had grown up on horses since childhood.
But the Academy Examination has always been fair and open, so he couldn't help but not believe it.
"Father, how about... let him try?"
"..."
Yan Yundang glanced at his son, and originally wanted to scold him, but when he saw the worried expression on his eldest son's no longer young face, he finally felt soft in his heart and sighed: "Forget it, forget it, alas. , just give it a try.”
Yan Yundang sat on the chair with a straight face, his left hand spread out and placed on the table, waiting for a pulse diagnosis.
Li Ang was not polite, pressed the wolf hair above his lips, stepped forward, took his pulse for a while, then asked a few questions about his family members, and then physically checked his upper abdomen and other parts.
'There are many potential causes of jaundice, but there is no body surface fever, no upper abdominal pain, and no gastrointestinal bleeding - this rules out the possibility of viral hepatitis, cholangitis, liver cancer, periampullary cancer and other diseases.
And patients with cirrhosis can see faces with chronic liver disease, spider nevi, liver palms, facial telangiectasia, etc. - they don't exist, which proves that it is not the case.
In addition, it is not cholestatic jaundice - there are no xanthomas on the eyelids and other parts of the body. According to the family members, the patient's urine color has not turned into a strong brown color...'
Li Ang quickly screened for the cause of the disease and suddenly asked: "How many hours did the Duke sleep in a day during this period?"
The corners of Yan Yundang's eyes twitched, and the corners of his mouth pulled down.
Yan Lin took a deep breath and said, "My father has to sleep for six hours a day during this period, and sometimes he sleeps for seven hours."
"Are you sleepy..."
Li Ang frowned slightly and said, "Do you feel that the gait of your lower limbs is unstable, that you have difficulty walking, and that your hands and feet are often symmetrically numb?"
Before Yan Yundang could speak, Yan Lin jumped in and said, "Yes."
"I see."
Li Ang thought for a moment and said slowly: "My lord, this is anemia."
To be precise, it's megaloblastic anemia.
Megaloblastic anemia is a type of anemia caused by disorders of DNA synthesis. It can be roughly divided into two types:
One is pernicious anemia caused by lack of vitamin b12.
One is megaloblastic anemia caused by a lack of folic acid (vitamin b9).
The clinical manifestations of these two anemias are quite similar, including fatigue, shortness of breath, dizziness, palpitations, pale complexion or mild jaundice, often accompanied by neurological symptoms such as abdominal distension, diarrhea, glossitis, and weakness in the hands and feet.
"Anemia..."
Yan Lin had a complicated expression on his face and said in a deep voice: "My father has been taking Siwu Decoction and other blood-nourishing prescriptions during this period, but he has not seen any improvement."
Li Ang shook his head helplessly and said: "Anemia is both a disease and a symptom.
The root cause lies in the intestines and stomach. "
"stomach?"
As soon as these words came out, not only Yan Lin was shocked, but Yan Yundang and Qiu Zhen also frowned.
"That's right."
Li Ang nodded and changed the topic: "When I walked from the backyard just now, I saw four cages of pigeons raised in the yard?"
Pigeon?
Yan Lin and others were even more confused and couldn't follow Li Ang's thoughts at all.
What is the relationship between pigeons and the intestines?
Do you want to drink pigeon stew?
Yan Lin nodded and said: "Well, those pigeons were raised by my son for fun according to the paper on flying pigeons in the academy journal."
"I also liked raising pigeons when I was a kid."
Li Ang said: "But because my family doesn't have much money, the scale of breeding is not as good as that of the Duke's Mansion, and I only raise ten.
Among the ten pigeons, five have full wings and are docile.
Five have bad tempers and often peck people. "
Yan Lin and others frowned, not knowing the reason why Li Ang said this section.
Just to show that five won’t work?
Li Ang continued, minding his own business: "I like those five docile ones, so I feed them finely ground rice every day, with the bran and aleurone layers removed.
I hate the five grumpy ones, so I feed them cheap brown rice.
But as time went by, the five pigeons, who were docile and had sex every day, became languid.
But the pigeons that ate brown rice were as strong as ever. "
"Control Variable?"
Qiu Yan's eyes lit up at the side. Ever since he heard Li Ang's novel statement at the restaurant that day, he felt that many things suddenly became clear.
The two control groups had only one different condition, and the rest of the preliminary test conditions were all the same.
If the final results of the control group are different, then the initial different conditions are the determining factor causing the difference.
"Yes, at that time I wanted to figure out why the two groups of pigeons showed different results."
Li Ang said: "I separated the five docile pigeons. Three of them were still fed with ** rice, and the other two were fed with brown rice.
Of the five grumpy pigeons, three were still fed brown rice, and the other two were fed ** rice.
As time went by, I found that no matter whether they were grumpy or mild-tempered, as long as the pigeons only ate polished rice, they all showed signs of malaise.
All sick pigeons can recover from their illness as long as they start eating brown rice again.
From this, I determined that brown rice contains some special substance. When this substance is lacking for a long time, pigeons will become sick. "
This is the experiment conducted by Polish biochemist Casimir Funk in 1911. He gave the name to the specific substance he defined - vitamins
Or rather, vitamins.
