What we think of as the brain’s processing speed is actually the ways in which electrical signals travel across axons, which are essentially the wiring connecting different parts of the brain. The white matter of the brain is made up of all of this wiring, and it is fed by blood vessels, meaning that vascular problems such as diabetes and high blood pressure can starve the axons of much-needed oxygen and glucose. Therefore, staying fit and getting plenty of aerobic exercise is the number one suggestion by most neurologists to sustain axons and even potentially improve processing speeds. A regular cardio routine has also been linked to an increase in the birth of new neurons in the hippocampus, which is a part of the brain important to learning and processing. Physical health goes hand in hand with brain health. Along with the right amount of exercise, you should also maintain a balanced diet. You can additionally focus on specific foods linked to brain health, such as:  Avocados - Avocados are great at assisting in the prevention of vascular conditions, such as high blood pressure, and healthy blood flow is essential for a healthy brain. Avocados are high in fat, though, so limit yourself to a quarter or half an avocado a day. Blueberries - Blueberries are packed with antioxidants, which means they protect the brain from oxidative stress and may reduce the effects of age-related conditions. Aim for one cup of blueberries per day. Other great antioxidant-rich foods include pomegranate juice and dark chocolate.  Wild salmon - Omega-3 essential fatty acids, such as DHA, are essential for brain function. Deep-water fish such as salmon, sardines, and herring are full of them. Aim to eat a four-ounce serving two-to-three times per week.  Nuts and seeds - Nuts, especially walnuts, and seeds are a great source of vitamin E, which helps to fight cognitive decline as we age. Try to add one ounce a day.  Beets - Beets can increase blood flow to the brain, which may help improve your cognition. You can eat beets in a...

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Write a summary of the previous text in Chinese:
多做有氧运动。 健康饮食。 每天保证适量睡眠。 尝试促智药。 不断学习。 开始演奏乐器。 保持社交活动。 戒烟。