CATDOLL : CATDOLL: My eyes hurt when I see the light

1. Eyes hurt when seeing light

The reason why reading and writing in the dark has a bad effect on the eyes is that the light is too dim and the eyes cannot see clearly what they are reading or writing. In order to see the target clearly, the eyes will definitely get closer to the target and carefully chase it. Over time, this will naturally change the refractive system of the eyes and cause myopia. But isn't it better if the light is brighter? Too bright light is not good either. Light has brightness and brilliance. When the brightness is moderate and the brilliance is too strong, it will make people feel dazzled or dizzy, and the finer details will not be seen clearly. The burden on the eyes will naturally increase, and the ciliary body will be tense, which will easily cause eye fatigue.

It is advisable to use an incandescent lamp or an eye protection lamp as a desk lamp. Although fluorescent lamps have a higher luminous efficiency than white lamps, both new and old fluorescent lamps have a fatal weakness, which is constant flickering. Although the flickering frequency is high and difficult for us to detect, this flickering can easily cause eye fatigue. Incandescent lamps are different. They use the light generated by the current passing through the filament with low impedance as the lighting source. Although the brightness is not as good as that of fluorescent lamps, it is much more natural and softer than that of fluorescent lamps, and the stimulation to the eyes is also much less. Therefore, as a lighting device for reading and writing, it is advisable to use incandescent lamps as desk lamps.

2. Why are all the hairtail fish dead? Why do hairtail fish die when they come out of the water?

Most of the time when we go to the market to buy hairtail, we often find that they are frozen dead hairtail. There is even a saying that hairtail are sold dead and not alive. Hairtail dies as soon as it leaves the water, which has become a curse. Many hairtail cannot be kept alive in artificial breeding.

The reason why hairtail dies as soon as it comes out of water is that hairtail belongs to deep-water ocean fish and is under enormous water pressure underwater, but there is also pressure from the water in its body that expands outwards, so it will not be crushed. Once it is pulled to the surface of the water, there is a pressure difference due to the atmospheric pressure which is much smaller than the water pressure. The air pressure is small and the pressure in the hairtail's body is large, so the pressure in the hairtail's body quickly expands outwards, bursting its internal organs, and the hairtail dies.

Hairtail mainly lives in waters below 30 meters. During the winter, it goes to about 60-100 meters underwater. It only migrates to shallow seas to spawn. Hairtail dies as soon as it comes out of the water, mainly because the internal pressure cannot adjust to the pressure changes between the deep sea and the sea surface. Therefore, the hairtail we see in the market often has a broken stomach. Hairtail is a migratory fish, and it is basically caught in large fisheries.

Hairtail is known as one of the four famous seafoods in the East China Sea and is deeply loved by the people. Today, large yellow croaker, small yellow croaker, and cuttlefish have all made breakthroughs in artificial breeding technology through scientific research and public relations, but the East China Sea hairtail has the curse of dying when out of water. When it is caught and taken out of water, due to the sudden decrease in external pressure, fatal changes will occur in the body, leading to death. Therefore, there is no record of artificially raising hairtail in China. Today, this batch of hairtail from Zhoushan Fisheries Research Institute has achieved an important breakthrough in migrating from the sea to an artificial breeding environment.

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If you have a severe cold, boil water with jujube, ginger and brown sugar and drink one bowl of water every day.

4. When should young ginger be planted to be available on the market during the Dragon Boat Festival?

The fifth month of the lunar calendar is called the "Five Yellow Month" by people in the south of the Yangtze River, because five foods with the "yellow" sound are on the market. At noon on the Dragon Boat Festival, it is best to eat a five-yellow meal, which is to mix five kinds of yellow foods together.

Because according to traditional Chinese medicine theory, the Dragon Boat Festival is on the fifth day of the fifth month of the lunar calendar, which is the time when the yang energy is at its peak in the year, and noon is the time when the yang energy is at its peak in the day. You can use the power of the Dragon Boat Festival to suppress bad luck and boost your energy.

The fifth month of the lunar calendar is called the Wuhuang Month in the Hangzhou-Jiaxing-Huzhou region. The custom of eating "Wuhuang" during the Dragon Boat Festival has a long history among the people in the south of the Yangtze River. Many people know that they have to eat "Wuhuang" during the Dragon Boat Festival, but not many people know why they have to eat it. "Wuhuang" generally refers to yellow croaker, yellow eel, cucumber, salted egg yolk and realgar wine.

Yellow croaker: Yellow croaker usually likes to live in deeper waters, migrating to the coastal waters to spawn from April to June, and returning to the deep sea in autumn and winter, so it is used as a seasonal dish around the Dragon Boat Festival. However, due to overfishing and environmental pollution, the so-called large yellow croaker we eat now is basically farmed.

Yellow eel: Through artificial breeding, it can now be eaten all year round, but in the past, yellow eel was eaten during the Dragon Boat Festival. After a winter of breeding and a spring of recovery, coupled with the warmer weather and abundant food sources, wild yellow eels are particularly strong and plump during the Dragon Boat Festival, and the meat of yellow eels is tender at this time, which is the best time to choose food. Yellow eels at this time are still very nutritious. Ancient medical books have also recorded that the function of yellow eels is to replenish deficiency, eliminate rheumatism, and strengthen muscles and bones. Therefore, there is a saying among the people that "yellow eels during the Dragon Boat Festival are better than ginseng."

Cucumber: When I was a kid, I often asked a question: Why don't cucumbers turn yellow? Many adults can't answer this question. In fact, what Yuhang people call cucumbers are actually called melons. There are differences between cucumbers and melons. From the appearance alone, melons are longer and thinner, with more thorns, green on the outside, and white or light green flesh; while cucumbers are shorter and more bulging, with fewer thorns on the body, and the color of the tender fruit ranges from milky white to dark green when ripe. Because the two melons look alike, I don't know when melons were confused with cucumbers.

Salted egg yolk: It is loved by people because of its excellent taste and easy storage. Perhaps, the liking for salted egg yolk may also come from family affection! I remember when I was a child, my father saw that I liked to eat egg yolks, and he always picked out the egg yolks and put them in my bowl and said, "My daughter likes to eat egg yolks, and my father likes to eat egg whites, just right!" Later, I found that my father also liked to eat egg yolks when he ate alone.

Realgar wine: The origin of medical history "Qing Jia Lu" records: "Grind realgar powder, cut cattail root, mix with wine and drink it, it is called realgar wine." That is to say, realgar wine is made by blending white wine and realgar. Why is such a simple drink so famous? This is probably related to the story of White Snake and Xu Xian. White Snake drank realgar wine on the Dragon Boat Festival and showed her original form of a snake. Therefore, the people probably believed that poisonous insects such as snakes, scorpions, centipedes, etc. can be killed by realgar wine, and drinking realgar wine on the Dragon Boat Festival can drive away evil spirits and detoxify.

5. How long can hairtail survive after being taken out of water?

Carp can survive 10 minutes to 20 minutes without water, crucian carp can survive 20 minutes to 40 minutes without water, and other fish can survive 1 minute to 10 minutes.