1 . By now we all know the importance of drinking enough water throughout the day, but there is such a thing as too much. Earlier this summer, a 35-year-old Indiana woman, died from water toxicity(毒性作用) after drinking too much water in a short period of time, according to a local news report.

While drinking enough water is important, overdoing it can lead to low levels of sodium(钠) in the blood, which can be life-threatening, according to Julia Zumpano, an expert at Cleveland Clinic’s Center for Human Nutrition.

Exactly how much is enough for our body depends on a variety of factors, including our weight, age, location and overall health. People in poor health, or active people such as athletes, are at risk of water toxicity, as they tend to drink large amounts of water and lose sodium through their sweat. So are women and children because of their smaller body size.

While the gold standard for many years has been eight glasses of 8 ounces(盎司) of water per day, the National Academy of Medicine suggests enough water intake is about 125 ounces for men and about 91 ounces for women. And it recommends not drinking more than 48 ounces of water per hour. This includes total water from fruits, vegetables and other drinks besides water.

If you struggle with getting enough water per day, you can try water bottles to help track your water intake. Eating fruits and vegetables can also increase our water intake. You could experiment with adding flavor to improve the taste of your water.

“Most people had better keep drinking water throughout the day, but larger amounts may be needed in the heat for an extended period of time or during exercise. If you are thirsty water—listen to your body. But don’t overdo it,” says Zumpano.

Ebru is a Turkish art from Central Asia     1     began at the beginning of the 16^th century. It is thought that Ebru art first     2     (appear) in China but became popular in Turkiye during Ottoman times.

It is     3     art form where you paint directly on the surface of water in a shallow tray (托盘). Once you’ve finished your design, you need to put a sheet of paper on the surface     4     (change) the design from the water onto the paper. Historically, paper marbling (大理石纹饰) was the only form, but today, patterns can     5     (print) to all sorts of things such as leather, glass, cloth, furniture, book covers and notebooks.

The process sounds simple, and     6     (actual) it is, but the results are hard to master. An Ebru     7     (art) will paint for decades before he or she is recognized as true master of the art.

Back in the Ottoman Empire, the Ottomans used Ebru to decorate (装饰) the spines of books with     8     (colour) designs. Not only was this decorative, it was also used as a type of code. If the pattern on the spine was     9     (break), then you’d know some pages were missing from the book and someone had intercepted the message.     10     clever that is!

6 . Five years ago, I got an email from a well-known professor in my field in March. He invited me to _________ for a position in his lab. Things went well and all I needed to do was finish up my thesis (毕业论文) and I decided to _________ it in the following months.

One night, my mother came up to my room, asking softly, “Have you _________ your thesis yet?” “Not yet, Mom,” I _________, even too busy to look up at her. Then she mentioned that she had some _________ symptoms (症状) in her body that had never been seen before. She wanted to say something more, but my academic (学业的) _________ made me hardly take her words to heart.

However, two months later, the doctor announced my mother might _________ for less than a year _________ cancer (癌症). It was then that I _________ that things became more serious than I had imagined. Before it was too late, I was __________ to stop my thesis and be there with my mother for her rest life. __________, my mother failed in the battle and passed away at the end of the year. The next July, I finished my scientific thesis and got the __________ from the lab.

When looking back today, I feel __________ for losing precious time with my mother. The __________ of my mother gave me a new way to think about life: If your loved ones need you, be there for them. Science will be waiting when you __________.