Xiao Han turned to face everyone: "Do you have a feeling of suffocation that your nasal cavity, throat tube, and even chest cavity are covered by some substance?" ”

Everyone, you look at me, I look at you, and then nodded yes in unison.

"Okay, now you, you, and you!" Xiao Han pointed to the three soldiers who seemed to have the most difficulty breathing, "You guys go with me to the outside of the account!" ”

The three of them looked at each other, and it was estimated that they were extremely reluctant in their hearts, after all, they were sick and had to go outside to blow the cold wind for no reason, and they really didn't know what kind of medicine was sold in the princess's gourd.

One second the big guy was still complaining secretly, and the next second after stepping out of the account with the princess, he suddenly felt a "sudden enlightenment" in his chest, and suddenly breathed smoothly.

"Come, follow me, take a deep breath, inhale - "exhale - inhale again" Xiao Han personally demonstrated, and after a few reincarnations, the soldiers were much refreshed. "How? My 'medicine' still works! ”

In fact, she didn't need to ask, as soon as she walked out of the tent, Xiao Yu already felt the crux of this cough, and she just blindly felt that it was stuffy in the account, but she didn't think that there was a problem with the air circulation. But although the source of the disease was determined, he still had some doubts about this principle - the space was closed and stuffy and it was often encountered, but why did he rarely encounter such a situation?

Fortunately, Zhang Zihe also had the same question, and actively sought answers on his behalf: "Forgive the last general for ignorance, why does a mere heat make the soldiers dizzy and suffocated?" Even if it is the heat of the dog days, there will be no such poisoning feeling, and it will not be like this, and it will not get better immediately after taking two breaths of fresh air like this. ”

Xiao Han smiled, and didn't rush to answer him first, but ordered someone to remove all the charcoal fires in the house, and lift the door curtains and curtains of the tent. For a while, the one or twenty soldiers in the account suddenly felt that their breathing was smooth and their nerves were refreshed.

After Zhang Luo finished this, she clapped her hands and said, "Because in addition to the sultry heat caused by poor air circulation, there is another reason for the soldiers to be poisoned. ”

"But the coals you just removed?" Xiao Yu thought of the faintly aggressive smell in the room before, and remembered that she had just identified the charcoal fire as the culprit.

"That's right, if the charcoal fire is not completely burned in an oxygen-deficient environment, it will produce a toxic substance called carbon monoxide, which is colorless and odorless, so it is difficult for people to perceive its existence, and when the inhaler feels breathless and choked in the chest, it is already the time for it to enter the body to exert toxicity." As she spoke, she pointed to the doors and windows around her, "You see, the doors and windows in the house were closed before, which made the air in the house like a pool of stagnant water, and the oxygen in the natural air was very scarce, and charcoal burning needs to consume oxygen - this is the crux of the problem." On the one hand, we inhale insufficient oxygen, and on the other hand, charcoal cannot be fully burned due to insufficient oxygen, so toxic carbon monoxide is released. ”

Everyone seems to understand what she says, especially the new words in the brain, which are completely unheard of.

"The last general is stupid again," Zhang Zihe smiled embarrassedly, "The poison that the princess just mentioned, carbon monoxide, is this poison powerful?" How can I detoxify? And what else is completely incompletely burning...... Oh yes, what is oxygen? ”

Xiao Han opened her mouth to answer, but when she said it, these questions suddenly hit her head like a slap in the head, making her mind shake violently. Carbon monoxide, carbon dioxide, oxygen, hemoglobin, combustion and incomplete combustion, air molecules, hydroxides, carbide ...... Accompanied by the sound of gurgling blisters, the popping sound of flames burning under the vessel, the sizzling sound of something melting in strong acid, and the cacophony mixed with a stern female voice, some inexplicable keywords and symbols suddenly flew sideways in her head, and various shattered and interconnected images kept intersecting.

"Princess?"

Zhang Zihe's voice suddenly interrupted her tumbling thoughts, and in an instant, he dragged her back to the green lantern couch in front of her. In just a second and a half, she was almost about to connect the fragmented memories.

"Oh," she came back to her senses, "this poison is not difficult to solve, as long as the intake is not too much, it can be relieved by inhaling fresh air again." ”

"But it's common to close the doors and windows and burn charcoal to keep warm in the house like this, so why don't you see poisoning on weekdays?"

"This is the problem of oxygen content that I just mentioned, usually we are at home, a large room, at most three or five people, so that the oxygen in the air in the room is absolutely sufficient, people will not lack oxygen, charcoal fire will not burn enough and release a large amount of carbon monoxide. Besides, when ordinary people are at home, where they can sit for a long time and often go in and out, people will not always be trapped in a miasma. ”

Although he still had doubts about some of her words, he probably understood them when he heard this. "The soldiers have been resting in tents with several pots of charcoal fire every night for several days, and they have accumulated a lot of poisonous gases, but fortunately, the weather has been fair for a few days, and everyone will come out from time to time to walk around when they feel bored, and the symptoms have been relieved; But today, after a whole day in the cold wind, it was very cold, so I didn't want to come out after entering the warm tent, and then I thought that the cough might be related to the wind cold, so no one dared to go out to be cold, so the poisoning became more and more serious. ”

Xiao Han smiled at him, "You can teach", "Correct understanding!" In addition to removing the excess charcoal fire from each account, the most fundamental thing is to think of a way to keep out the cold without having a negative impact. ”

Zhang Zihe was a little worried, and was embarrassed: "To say that in addition to adding a few more cages of charcoal, I really can't think of any good way to keep warm in this wilderness, after all, there are so many cotton clothes and quilts, but the suburbs are deserted, the temperature itself is low, and the humidity is quite heavy at night, and a gust of wind blows casually is cold to the bone marrow, so although there is no serious illness, it must delay the march and fight." ”

Xiao Hanmo rubbed his chin and paced back and forth for a few steps: "There is a way to try." ”

The two followed her all the way to the kitchen of the post station, and Xiao Han greeted the guy: "There should be a lot of old ginger in stock here, right?" Give me as many as you want! ”

The man was a little baffled, but the princess's orders dared to be lazy, so he searched out a bamboo basket full of ginger pieces from the foot of the cabinet.

"Let's help out, peel the ginger, cut it into thin slices, and boil it in the pot with brown sugar." She rolled up her wide sleeves and looked like a hostess.

"The princess can't help ......it" Zhang Zihe just wanted to step forward to stop it, but was stopped by Xiao Yu raising his hand, he nodded his chin and signaled the deputy general to go to work first, and then lowered his head and rolled up his cuffs as if nothing happened.