First, read the English article below.

Summer-bearing raspberries only bear fruit on floricanes, which means that you need to let the canes grow for two years to produce fruit. Generally, you will prune floricanes to the ground after they have fruited. Allow primocanes to grow so that they will develop into floricanes and fruit in the second year. If there are too many primocanes, however, you may need to suppress them by thinning out their crop.  Primocanes are often pruned in late spring while floricanes will be cut down after they have fruited or during the winter. Do not suppress primocanes until the plant is three years old. Thinning the primocanes too much may reduce the yield of your harvest. Floricanes die off after a single harvest, so leaving them will do you no good. Once they have produced a crop in the second year, use your shears to cut them at ground-level, and then toss out the branches when you’re done.  You can also cut out non-fruiting suckers. When your raspberry plant begins growing canes again, you may need to thin them to create a bigger crop. Too many canes will restrict the growing of each individual cane, limiting the total number of berries and the size of berries it will produce. Remove canes so that each cane is 9-inches from the next, keeping only the biggest, healthiest canes in the process.  When pruning in late spring, you should leave four or five primocanes per foot, and let these grow into floricanes in the next year. Some people will prune the first set of emerging primocanes completely in late spring. Primocanes that emerge later are allowed to grow to produce fruit in the second year. This method should be skipped every third or fourth year, and it is not recommended for black raspberries. Pinching the canes in the process of cutting off a small amount of the tip, to stimulate more growth. Because your raspberries grow from the ground up each year, they likely won’t need to be pinched or pruned - they don’t have time to grow very large. However, if they become particularly tall, you can cut down 3–4 inches... 

Now, please write a short abstract for it in Chinese. Abstract:
知道何时修剪。 剪掉所有的有花茎。 给藤蔓打薄。 如果有必要的话，春季时给藤蔓打尖。