First, read the English article below.

Click the Apple menu, click Shut Down..., and click Shut Down when prompted. This will make sure that you cannot be shocked, and it also ensures that you don't accidentally harm your Mac while removing the key. . Even though you aren't likely going to be touching circuitry or equally sensitive components in your Mac, grounding only takes a few seconds and it eliminates the risk—however small—of harming the key's electrical components. You need something relatively wide, very thin, and durable. Some examples include the following:  Guitar pick Credit card Plastic spudger Plastic butter knife You'll need a Q-tip to clean the space between the keys, and a toothpick (or a similarly thin, pliable object) to remove any excess grit around the key. Using the toothpick or similar object, scrape around the underside of the key. Any crumbs, dirt, or other foreign matter should come away from the key as you do this.  Make sure you don't jam the toothpick into the key's underside; as always, be gentle. Only insert the toothpick around an eighth of an inch into the space below the key. Dip your Q-tip in some warm, clean water, then squeeze the excess water out—you only need the Q-tip to be a bit damp for this step—and swab the area around the key.  This is to remove any sticky or greasy build-up around the key, which will make removing the key easier. This step will also help clear away any residual grit left from your toothpick scraping. You can use isopropyl alcohol instead of water if the residue around your key is particularly stubborn. This is where the key will be easiest to detach. You will have to run the prying tool back and forth as you do so; as soon as you hear a couple of light snaps, the key is detached. It may help to press the bottom of the key down once the tool is inserted to help the tool gain more traction. The key should be facing you when you pull it up, since this will prevent the key's hooks from staying attached. Once you're finished doing whatever it is you need to do with the key carriage, you... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Rút điện máy Mac và tắt nguồn. Tự nối đất Tìm công cụ để cạy phím lên. Thu thập dụng cụ. Vệ sinh bên dưới phím. Vệ sinh khu vực xung quanh phím. Chèn công cụ nạy vào khoảng trống dưới phím. Nhẹ nhàng nạy phím lên. Xoay phím rồi kéo thẳng lên. Tiến hành sửa chữa nếu cần thiết.