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These are common knowledge (

Physical Examination#

Middle-aged people remind young friends that based on some experiences, there are certain problems that can exist and certain problems that must not exist.
Must not exceed: fasting blood sugar. Not only should it not exceed 6.2, but it should not exceed 5.8. You must start exercising if it is above 5.5. In fact, even 5.5 is not considered healthy.
Must not exceed: creatinine. Pay special attention to this indicator. It should not only not exceed, but even being close to the limit of 109 when you are currently at 100 is not normal. Moreover, exceeding this indicator is a significant problem. It is recommended to search on Baidu to scare yourself, as it is more important than blood sugar.

Must be rechecked: urine protein +- and urine occult blood +-. Pay attention, although +- is often temporary, you must go for a recheck to confirm this. If these two problems occur, it can be troublesome, so strict rechecking is necessary. Strict rechecking means you can try a normal diet instead of a bland diet to see if the results are normal.
Must be rechecked: blood pressure. Don't think that you are just nervous. If your blood pressure is not low for three consecutive times, start taking antihypertensive medication as soon as possible.

Must not exceed for many years: blood lipids. If it exceeds for many years, you may have early coronary heart disease at the age of 35. This is an accumulative indicator. As long as you keep exceeding it, you are putting yourself in danger.
Must not exceed for many years: uric acid. If your uric acid is consistently high for many years, it indicates a problem with your kidney function, although it is hidden and not serious.

Actually, it's okay to exceed a little: electrocardiogram. Go for a recheck. If you don't feel uncomfortable usually, especially after exercise, the abnormal electrocardiogram is just scary.
Actually, it's okay to exceed a little: CEA (carcinoembryonic antigen). This is quite scary, but many people actually exceed it. However, it should not exceed 10 in principle. But if this indicator increases every year and the increase rate is quite fast, then...

Gastric Reflux#

Gastric reflux is mostly caused by gastric acid reflux. If you go to the hospital, the doctor will mostly diagnose it as reflux esophagitis, which is the main culprit. From a medical perspective, it is Helicobacter pylori, but the root cause is still mental stress.

Methods to alleviate it

• More frequent exercise
• Eat less, diet
• Quit smoking
• Better sleep
• Distract attention through hobbies

Glasses Prescription#

Be sure to watch this video

• Optometry in optical shops is not recommended. Hospital optometry is too much like an assembly line and is ineffective.
• Look for sellers on Taobao or 1688 who can provide Carl Zeiss lenses. Look for original factory lens suppliers (you can check the records on the mini-program). Carl Zeiss is in Guangzhou, and Essilor is in Shanghai.
• Buy frames from places like Taobao and send them for lens fitting.

1. Weight of the lenses. The higher the prescription, the heavier the lenses. The brand and processing techniques will have an impact. It is not entirely true that the higher the refractive index, the lighter the lenses. The refractive index affects density, but it is not completely unrelated.
2. Abbe number is an important parameter for glasses. Abbe numbers below 30 are not allowed on the market. The weight of the glasses and the recommended options are 1.50 (Abbe number 50+, highly recommended for low prescription children), 1.60 (Abbe number 40-40.5), 1.67 (Abbe number 32-33), 1.71 (Abbe number 37), 1.74 (Abbe number 32-33). Do not buy 1.56 and 1.59. I have seen some domestically produced lenses, including a certain 1.59x lens from Essilor, which is less than 1.60. Many places advertise it as 1.6, so pay attention to the Abbe number (if it is below 39, it is not a normal 1.6 lens, it is made of PC material, which is plastic material), to avoid being deceived.
3. Abbe number is important, but not the only indicator. Some domestic brands have a refractive index of 1.71, which is higher than 1.67 and 1.74, but why don't all people choose 1.71? Because Abbe number is not the only indicator, material and processing techniques also play important roles.
4. Lenses and coatings are separate. For example, Carl Zeiss may have different types of lenses such as New Clear, Smartlife, and Duravision. There are also platinum coatings and blue light coatings. For example, Mingyue has PMC lenses as well as regular lenses, and there are regular coatings and A6 coatings. So, it is important to determine the type of lens and coating, and it is not just about choosing a brand. There are no specific recommendations, but there are a few brands that are not recommended: Essilor A, A+, etc. (those below A3), and Carl Zeiss's Lotus coating.
5. The purchase price of Carl Zeiss lenses is about 80% off, so if you see some on 1688 or Taobao that are 70% off the market price, it doesn't necessarily mean they are fake. Go to the official store and buy lenses that are 20-30% off and trustworthy.
6. Everything has its price - blue light protection also blocks natural light, so it is recommended to have two pairs of glasses, one for work and one for daily use. Scratch resistance and anti-glare are necessary, as for blue light - it is recommended to have two pairs; anti-fog is not necessary, a 19 yuan anti-fog wipe is suitable for everything.
7. The choice of frames is very important - do not neglect the most important "pupillary distance" for the sake of "coolness". The scientific method is to select frames based on the "pupillary distance". If the pupillary distance is not selected correctly, it is the first killer of eye fatigue and should be taken seriously. The formula is ((frame width + bridge width) - pupillary distance) / 2 ≤ 3.
8. Everything has its price - refractive index. The higher the refractive index, the thinner the lenses, usually the salesperson will tell you that. However, the dispersion will also be heavier. A higher refractive index does not necessarily mean clearer vision (higher refractive index is definitely more expensive). For degrees between 600-1000, choose within 1.71. For degrees below 600, choose within 1.6.

Fever#

• Fever in children is common due to the immature development of the hypothalamus. It is a normal phenomenon as long as there are no symptoms such as vomiting or fainting. Give the child some children's acetaminophen and wipe their body with a cold towel.
• Fever does not cause meningitis, but rather meningitis causes fever. Meningitis is generally caused by viruses or bacteria.

Sex Education (Both Sides)#

Dedicated to schools in China where this topic is rarely discussed.

• Ovulation day: Ovaries ovulate within two days before or after day 14 of the menstrual cycle.
• Fertile period: 1-2 days before ovulation and 2-3 days after ovulation, the chance of pregnancy is high during intercourse.
• Safe period: 10 days after menstruation and 20 days after menstruation, until the next menstrual period.
• The safe period calculation method is not reliable and only applies to girls with absolutely regular menstrual cycles. However, menstrual cycles vary according to a girl's emotions and health status. Especially for young couples who haven't seen each other for a long time, when they finally meet and feel excited, it becomes a dangerous period.
• Clean before and after intercourse, cleaning the external genitalia is sufficient.
• How to take care of girls with irregular menstruation: Avoid excessive stress and emotional fluctuations.
• If no safe measures are taken and ejaculation does not occur inside, the chance of pregnancy is low, but there is a survivorship bias. In the medical field, this low probability event often occurs. Whether to take emergency contraception pills needs to be weighed against the unsafe factors. Compared to the trauma of abortion, emergency contraception pills have much less side effects and harm.
• Proper identification of the correct side of a condom. The thin film should be on the inner side of the ring.
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Menstruation#

• Boys must understand premenstrual syndrome (PMS): https://en.wikipedia.org/wiki/Premenstrual_syndrome. It is important to understand that this is a physiological difference that cannot be avoided. Treat her as a patient and do not try mystical practices such as letting her control her temper, drink more hot water, or wash dishes (she already has back pain and standing for a long time is difficult). "Girls have a stronger tolerance for pain than boys."
• Boys should be familiar with sanitary pads and be able to accurately buy her preferred brand. "She will tell you, just remember it."
• When girls have their period, it is okay to engage in light exercise such as jogging as long as their physical condition is good. However, activities that involve twisting the body or using a hula hoop, which can compress the internal organs, should be strictly avoided. "I recommend listening to this podcast episode: What should you do when your girlfriend has her period? - from Dao FM"
• Menstruation is not directly related to weight loss. Eat normally as you would.

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