阅读下列短文, 从下面每个小题的A、B、C、D四个选项中选出最佳选项。

A study conducted by the University of Leeds in the United Kingdom suggest that watching cute animals may lead to a reduction in stress and anxiety.

The study examined how watching images and videos of cute animals for 30 minutes affects blood pressure, heart rate(心率) and anxiety. In December 2019, 19 people, including 15 students, joined in the study.

"There were some kittens, there was puppies, there were baby gorillas, there were quokkas —cute creatures found in Western Australia, are often referred to as 'the world's most cheerful animals'." Dr. Andrea Utley, a professor at the University of Leeds told CNN. The study was timed during winter exams, a time when stress is at an especially high level for students, according to Utley.

 The study recorded that the average blood pressure dropped from 136/88 to 115/71, which the study pointed out is "within ideal blood pressure range." Average(平均的) heart rates were lowered to 67.4 bpm, a reduction of 6.5%. Anxiety rates also went down by 35%.

"I was quite pleasantly surprised that during the session, every single measure for every single participant dropped some — heart rate reduced, blood pressure reduced," Utley said. "When they left, they filled the questionnaire(调查问卷) in again and showed that they were feeling less worried."

When questioning the participants, the study found that most preferred video clips over still images, particularly of animals interacting with humans.

Every school has its rules. The rules are different. Here are some funny school rules in different countries.

Japanese rules

Most schools ask the students to wear uniforms, such as sports suits or skirts. In many Japanese schools, if the students don't tell their schools, they can't go to cinemas, leave home in the evening or play computer games.

Different shoes in the US

In some schools, the students must wear indoor shoes in school. So the students will not fall down, and they are safe on the floors. They can keep the schools clean, too. Students can't eat gum(口香糖), because it's hard to clean.

No strange hair in the UK

The students can't have strange hair in some British schools. But the students can wear certain hairstyles during the World Cup years.

Mrs. Black is an English woman. She is eighty years old. She likes cats. She has many cats at home. The students all like to come to her home. They like to play with her cats. More and more（越 来 越 多 的）cats come to the old woman's home. Soon she has too many cats. The old woman can't feed（喂养） them all."The students like my cats,"she thinks. So she gives the students her cats. Then she is happy. The students are happy, and the cats are happy, too.

The Spring Festival is the most important festival for all of the Chinese. It's like Christmas(圣诞节) in the west. It falls in January or February every year. It lasts about fifteen days. Before the festival comes, we do a lot of things for it, like doing some cleaning and shopping. Spring Festival Eve (除夕) is the night before the Spring Festival. All the family members get together and wait for the new year by watching the shows on TV. People like eating dumplings best that night because they have special meanings. People think they can bring good luck to them. The grandparents usually give lucky money to their grandchildren as a new year gift with a red envelop (红包). The festival brings a lot of happiness to kids, so they look forward to it.