(1) ①Ideal is the longing for a better life in the future, reflecting our planning and design of life and future life. ②Different people have different pursuits of ideals. We should establish life goals that suit us based on our own characteristics and interests. ③Ideals reflect a person’s spiritual realm and can only be consistent with the direction of social development and consistent with the aspirations of most people. Personal ideals that are consistent with interests and happiness are lofty ideals and will make us nobler. ④Ideals originate from reality and are the sublimation of reality. If the ideals of life are not based on reality, it will be unrealistic and utopian. ⑤The correct ideal is the guide of youth and the driving force of life. Once established, we must work hard unremittingly to make the beautiful ideal become a reality.
(2) "Short" (as long as it conforms to the meaning of the question and makes sense)
(3) ① Have a spirit of not being afraid of difficulties and overcoming setbacks and overcoming hardships. ②Be down-to-earth, start from bit by bit, and accumulate from small things. ③With a scientific attitude, break down the long-term goals into a series of staged and highly operable specific goals, and achieve them step by step. ④ Develop practical implementation plans, start from today, and learn knowledge in various subjects. ⑤ Cherish time, use your precious youth time to learn knowledge, continuously enhance your own abilities and improve your own quality.