When the students present heard that they were going to rescue the hamster, their eyes widened, and their hearts became excited to varying degrees, and they listened carefully.

Zhang Zi'an took advantage of this rare opportunity to first explain the principle to them.

Hibernation is an instinct shared by many animals, from small rodents, medium-sized reptiles, to large carnivores such as bears, who choose to hibernate in order to cope with the cold and food shortages. These animals have a drop in body temperature and metabolism during hibernation, and can even go without eating, drinking, or moving all winter.

Hamsters also have some degree of hibernation ability, but compared to the well-known hibernation animals, hamsters' hibernation ability is barely entry-level.

Other hibernating animals will prepare very professionally before entering hibernation, eat themselves fat, store enough fat in the body to consume and keep warm, choose a sheltered, comfortable, secluded, and safe nest, hide themselves in it, and when they come out again, it is already spring.

Shishi likes to wear sweaters for her and Liu Sanlang's Labrador to keep warm, Zhang Zi'an specially told her about the problem of "specific surface area", the smaller the animal, the larger the specific surface area, the more prone to hypothermia, so medium and large dogs do not need to wear clothes in winter, only small dogs need to be needed. Hamsters are much smaller in size than small dogs and are more sensitive to temperature changes.

The hibernation of hamsters is very hasty, they do not know how to take precautions, and they will temporarily enter a state of hibernation when they encounter a harsh environment that cannot survive, this kind of hibernation is very dangerous, and it is possible to not wake up for a while. Everyone can't stand it, and they feel that it is really inappropriate for other animals to call this life-saving behavior of hamsters "hibernation", so they simply call hamster hibernation "pseudo-hibernation" or "false hibernation".

Although Zhang Zi'an has only been here for a few minutes, he has already found several problems in several details, such as the lack of pure wood chips, the shelf where the utensils are placed in the north instead of the south, the indoor humidity is slightly large, and the utensils are not qualified, etc., these are the reasons why the hamsters go into hibernation, but the most essential reason is that the temperature is too low.

"I'll help you move the shelves under the south window in a moment. The reasons for false hibernation are, first, low temperature, and second, short daylight hours. Now you separate up and prepare some things, let's revive them first. Zhang Zi'an thought for a while and assigned the task: "Is there a kettle? Also, is there a syringe? or something like that. ”

"There's a kettle in the classroom, I'll get it. A little boy volunteered.

Wang Yaning frowned and said, "The syringe seems to have ...... in the biology classroom and the school hospital But the biology classroom and the school hospital are closed now...... The biology teacher and the school doctor were not there. Why don't you go out and buy it?"

"I'll go, I know there's a store nearby that sells toy syringes. The other boy raised his hand and said. After Zhang Zi'an agreed, he recklessly ran outside a few steps, and then ran back and asked, "How many to buy?"

"1, the cheapest will do. Zhang Zi'an held up a finger.

"Good. The little boy ran out as well.

"Does anyone bring sugar?" asked Zhang Zi'an.

"I ...... I have sugar ......," Xiao Celery and another girl other than Wang Yaning said weakly.

"You'll need to add some sugar to the hamster in a moment, so can you contribute your sugar? One piece, no, half a piece, a little bit. Zhang Zi'an asked gently.

"Good...... Good. The little girl grabbed a few pieces of candy from her pocket and put them on the table.

Zhang Zi'an nodded at her, and then said to everyone: "Now everyone stretches out their hands, rubs their hands like this, and rubs their palms hot." ”

He quickly rubbed the palms of his hands and demonstrated to everyone.

They followed his example, and after rubbing it a few times, their palms became red and hot.

"Okay, now each person holds a hamster in the palm of their hand, and when they feel that the temperature has cooled down, they rub their hands again, and then breathe. Zhang Zi'an said, first pick up a hamster from the utensils and warm it up.

Each of the three little girls chose a hamster, held it in the palm of their hot hand, put it to their mouths, and blew hot air for them.

This is the easiest and safest way to heat up the hamster, using a foreign object such as hot water or an electric blanket to heat the hamster, it is not easy to control the temperature, and it may be self-defeating.

However, Zhang Zi'an only knew this method, and he had never tried it himself, and he didn't know if it would work.

The heat is continuously transferred from the palm of the hand into the hamster's body, and the hot air exhaled from the mouth blows through their head like a warm breeze.

"I'm back!" The little boy who went to the classroom to get the electric kettle came back first, holding a silver stainless steel kettle aloft, "Is this okay?"

"Okay is okay...... Zhang Zi'an stared at the kettle with a black line on his face, "But the problem is...... This is an electric kettle, right? What about the base for electricity? Are you going to drill wood to make a fire and boil water?"

The girls also found out about this and were amused to giggle.

The little boy was stunned for a moment, then looked at the kettle in his hand, and was immediately embarrassed, and stammered, "I...... I'll go get ...... again."

"Wait a minute!" Zhang Zi'an called to stop him, "just put the pot down and go get the base." ”

"Oh. The little boy was ashamed of himself, and after putting down the pot, he ran out as fast as he had just done.

After a while, the little boy who bought the syringe came first and bought the toy syringe. Zhang Zi'an also assigned him a hamster and asked him to follow their example to warm up the hamster.

After a few more minutes, the little boy in front of him finally brought the matching base of the electric kettle with a flushed face.

"Now take half a pot of water and bring it to a boil, being careful not to burn it. Zhang Zi'an assigned him a task.

Half a pot of water boils in just a few minutes.

Zhang Zi'an handed the hamster in his hand to the little boy, he filled half a cup of hot water in a small cup, and took a very small piece from the sugar cube and put it in the hot water. The small sugar cubes quickly melted and disappeared.

He shook half a cup of hot sugar water, and when the water cooled to a suitable temperature, probably slightly higher than a person's body temperature, he used a toy syringe to fill a syringe with water, and then broke the hamster's mouth in the little boy's hand and injected some warm sugar water into its mouth.

After feeding the hamster with sugar water, he did the same and fed warm sugar water to the other hamsters held in the palm of his hand in turn.

He put down the syringe and did everything he could, all that remained was to wait patiently, hoping that the hamsters' will to survive was strong enough.

Little Celery stared at the silver fox hamster in her palm of her hand with concern, and if her gaze was warm, her gaze would surely melt the ice.

Suddenly, her palms tickled, as if she had been scratched by something.

The hamster's body squirmed a few times and opened its eyes.