中文版回答：

做好吃又嫩的西餐牛肉粒需要注意以下几个要点：

1.选择优质的牛肉：选择有纹理、漂亮的牛肉，可以选择肋眼肉或西冷牛排。切割时，要注意肉纹的方向，垂直于切面，这样切割的牛肉不会过于筋道，更加嫩滑。

2.先用盐和黑胡椒粉腌制牛肉：将牛肉块抹上盐和黑胡椒粉，放入冰箱中腌制30分钟，可以让牛肉更嫩滑。

3.用高火快炒：先在平底锅加热油，达到高温后，放入腌制好的牛肉粒快速翻炒，火力不要太小，以免水分过多，造成牛肉老硬。翻炒时间控制在2-3分钟左右，不要炒过久，否则牛肉就会过分干燥。

4.加入蔬菜和调料：在牛肉炒制的同时，加入洋葱、蒜末、青椒等蔬菜炒香，增加口感。最后加入酱油、醋、糖等调料，快速炒匀即可。

5.最后翻一下奶酪：可以在翻炒结束后，将牛肉粒撒上一些奶酪，翻炒几秒钟即可。这样做可以让牛肉粒更加入味，口感更好。

英文版回答：

To make delicious and tender Western-style beef cubes, you need to pay attention to the following points:

1. Choose high-quality beef: Choose beef with texture and beautiful appearance, such as ribeye or sirloin steak. When cutting, pay attention to the direction of the meat fibers, which should be perpendicular to the cutting surface, so that the cut beef will not be too tough and more tender.

2. Marinate the beef with salt and black pepper first: Rub the beef cubes with salt and black pepper, and marinate them in the refrigerator for 30 minutes. This can make the beef more tender.

3. Use high heat and stir-fry quickly: Heat the oil in a frying pan first, and when it reaches a high temperature, add the marinated beef cubes and stir-fry quickly. The heat should not be too low to avoid too much moisture, which will cause the beef to become tough. Stir-fry for about 2-3 minutes, and don’t stir-fry for too long, otherwise the beef will become too dry.

4. Add vegetables and seasonings: While stir-frying the beef, add onions, garlic, green peppers and other vegetables to stir-fry until fragrant, which can improve the flavor. Finally, add soy sauce, vinegar, sugar and other seasonings, stir-fry quickly.

5. Sprinkle some cheese at last: After stirring, you can sprinkle some cheese on the beef cubes and stir-fry for a few seconds. This can make the beef cubes more flavorful and delicious.