定期换水。 处理水。 照顾花茎。 留心温度。 去掉多余的叶子。 摘掉花是必须的。 使用适当的工具。 使用防腐剂。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
One of the things that causes cut flowers to wilt so quickly is bacteria in the water. The most basic thing you can do to preserve cut flowers is to change the water once a day. Use cold water and add ice cubes before adding the flowers to the vase. You can also treat the water to inhibit bacterial growth. Two tablespoons of sugar, apple cider vinegar, or even a penny at the bottom of the vase can keep your flowers looking fresh for longer. A small amount of bleach in your vase water works well