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“Tooth loss and gum disease, which is inflammation (发炎) of the tissue around the teeth that can cause shrinkage (萎缩) of the gums and loosening of the teeth, are very common, so evaluating a potential link with brain diseases is incredibly important. Our study found that these conditions may play a role in the health of the brain area that controls thinking and memory, giving people another reason to take better care of their teeth,” said study author Satoshi Yamaguchi, Ph.D. of Tohoku University in Sendai, Japan.

The study involved 172 people with an average age of 67 who did not have memory problems at the beginning of the study. Researchers found that the number of teeth and amount of gum disease was linked to changes in the left hippocampus of the brain. For people with mild gum disease, having fewer teeth was associated with a faster rate of brain shrinkage, which was the same for people with severe gum disease having more teeth. After adjusting for age, researchers found that for people with mild gum disease, the increase in the rate of brain shrinkage due to one less tooth was equal to nearly one year of brain aging. By contrast, for people with severe gum disease, the increase in brain shrinkage due to one more tooth was equal to 1.3 years of brain aging.

“These results highlight the importance of preserving the health of the teeth and not just maintaining the teeth,” Yamaguchi said. Though the study does not prove that gum disease or tooth loss causes diseases like Alzheimer’s, it only shows an association. Yamaguchi added, “Future studies are needed with larger groups of people.” The current experiment involved only a small group of people in one region of Japan, and that too from one particular region of the world.

【小题1】What does Satoshi Yamaguchi’s research focus on?
A.The reason for gum disease.
B.The influence of brain shrinkage.
C.The advances in memory improvement.
D.The link between dental health and brain.
【小题2】What is paragraph 2 mainly about?
A.Supporting evidence for the research results.
B.Basic theories and results of a previous research.
C.A further explanation of the research methods.
D.The detailed procedures of the scientific research.
【小题3】What does Yamaguchi suggest people do?
A.Treat a brain problem with replacing teeth.
B.Frequently visit the dentists to maintain teeth.
C.Protect gums and teeth in their original good state.
D.Pull out one of their unique teeth as a study object.
【小题4】What probably can be involved in the follow-up study?
A.The application in related fields.
B.The further research in wider range.
C.The difficulties of making the previous studies.
D.The suggestions for preventing teeth disease.
2024·内蒙古赤峰·一模
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Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers.

Their study found that theobromine, found in cocoa, was nearly a third more effective in stopping coughs than codeine, which was considered the best cough medicine at present.

The Imperial College London researchers who published their results online said the discovery could lead to more effective cough treatment. “While coughing is not necessarily harmful (有害的) it can have a major effect on the quality of life, and this discovery could be a huge step forward in treating this problem,” said Professor Peter Barnes.

Ten healthy volunteers (志愿者) were given theobromine, codeine or placebo, a pill that contains no medicine, during the experiment. Neither the volunteers nor the researchers knew who received which pill. The researchers then measured levels of capsaicin, which is used in research to cause coughing and as a sign of how well the medicine are stopping coughs.

The team found that, when the volunteers were given theobromine, the capsaicin needed to produce a cough was around a third higher than in the placebo group. When they were given codeine they needed only slightly higher levels of capsaicin to cause a cough compared with the placebo.

The researchers said that theobromine worked by keeping down a nerve activity (神经活动), which causes coughing. They also found that unlike some standard cough treatments, theobromine caused no side effects such as sleepiness.

【小题1】According to Professor Barnes, theobromine ______.
A.cannot be as effective as codeine
B.can be harmful to people’s health
C.cannot be separated from chocolate
D.can be a more effective cure for coughs
【小题2】What was used in the experiment to cause coughing?
A.Theobromine.B.Codeine.
C.Capsaicin.D.Placebo.
【小题3】We learn from the text that volunteers in the experiment _______.
A.were patients with bad coughsB.were divided into the three groups
C.received standard treatmentsD.suffered little side effects
【小题4】Which of the following would be the best title for the text?
A.Codeine: A New MedicineB.Chocolate May Cure Coughs
C.Cough Treatment: A Hard CaseD.Theobromine Can Cause Coughs

Doctors in hospital emergency rooms often see accidental poisonings (中毒). A frightened parent arrives with a child who swallowed a cleaning liquid. Or perhaps the harmful substance is a medicine. Or it might be a chemical product meant to kill insects. These are common causes of accidental poisoning.

In cases like this, look for medical help as soon as possible. Save the container of whatever caused the poisoning. And look on the container for information about anything that stops the effects of the poison. Save anything expelled from the mouth of the victim. That way, doctors can examine it.

In the past, some people forced poisoning victims to empty the stomach. They used a liquid, syrup of ipecac (催呕剂), to do this. But an organization of children's doctors no longer advises parents to keep syrup of ipecac. The American Academy of Pediatrics says some poisons can cause additional damage when they come back up the throat.

Millions of people know a way to save a person who is choking on something trapped in the throat. The method is commonly known as the Heimlich Maneuver or abdominal thrusts. The American Red. Cross says a rescuer should first hit the person on the back five times between the shoulder bones. These bac blows may es the choking. If the airway is still blocked, he Red Cross suggests pushing hard five times along he victim’s abdomen. The abdomen is the areas between the chest and the hip (骨)bones.

【小题1】The underlined word “expelled” in the second paragraph means ________.
A.preventedB.swallowed
C.forcedD.chosen
【小题2】Save the container of whatever caused the poisoning to ________.
A.look for medical helpB.look on it
C.use it to break the poisonD.look for harmful information
【小题3】Why are parents advised not to keep syrup of ipecac?
A.To keep the stomach emptyB.To keep the stomach full.
C.To keep syrup of ipecac safe.D.To avoid more damage.
【小题4】The purpose of the last paragraph is to tell us about ________.
A.a way to prevent a person from chokingB.a way to cure choking
C.the abdominal thrustsD.the abdomen
【小题5】What would be the best title for the text?
A.Accidental poisoningsB.Learning the basics of first aid
C.Common causes of accidental poisoningD.Poisonings and first aid

Lisa Pina never thought she would need the fire safety training she received during her apprenticeship(学徒期) as a union painter and dry waller(筑墙工). On Friday morning, she was thanking God she had it.

On Thursday night, while Pina was babysitting her granddaughter, nephew and two nieces in her sister’s apartment, she smelled smoke and realized the apartment building was on fire. When her 4-year-old granddaughter Ilean Garcia began saying, “We’re going to die,” she knew she had to act. Pina, 39, first sealed the door, and then told all four children to get on the floor. After calling 911, she told the children to start singing and promised them all treats as soon as they reached safety. “I said, ‘OK, we’re going to lie down and we’re all going to play a game,’” Pina said. “We all started singing our ABCs and 123s. I was just trying to make it fun.” Pina patiently waited, and a few minutes later, Riverside County sheriff’s deputies (治安官的助手) arrived. Pina, Ilean, 8-year-old Gabriel Parga, 5-year-old Aubreyana Parga and 4-year-old Meriyah Parga were all trapped on the second floor as flames filled the first story. Pina did the only thing she could. She opened the window and dropped the children, one-by-one, into the arms of the sheriff’s deputies about 15 to 20 feet below. “I just needed to keep the kids calm so they wouldn’t be afraid,” Pina said. “I was deathly afraid inside, but I couldn’t let them know that.” Not long after dropping the children out of the window, fire-fighters arrived with a ladder and rescued her. Ten people were treated at the scene for suffering smoke, but nobody was seriously injured.

【小题1】What is the passage mainly about?
A.A big fire without serious injury.
B.An urgent call 911.
C.A brave babysitter.
D.A babysitter rescuing kids from a big fire.
【小题2】What does the underlined word “it” in Paragraph 1 mean?
A.A union painter.B.A dry waller.
C.The apprenticeship.D.The fire safety training.
【小题3】What did Lisa Pina do before she called 911,in order to prevent the fire?
A.She let children get on the floor.
B.She opened the windows of the second floor.
C.She had children start singing.
D.She closed the door hard.
【小题4】What do we know according to the passage?
A.The fire didn’t cause any injury.
B.Lisa Pina was the last one to be rescued.
C.The children were sent to hospital after the fire.
D.During the fire Lisa Pina wasn’t afraid at all.

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