Looking up...
The fruit on the lowest branch was within reach.
The fruit was close enough to be easily picked.
Close enough to be touched, accessed, or obtained easily.
The bookshelf was within reach, so she grabbed a book without standing up.
The bookshelf was close enough that she could reach it while sitting.
His dream of becoming a doctor was finally within reach after years of hard work.
His goal of becoming a doctor was now achievable.
This phrase is often used both literally (physical proximity) and figuratively (achievability).
Remember that 'within reach' can describe physical proximity (e.g., an object) or abstract attainability (e.g., a goal).
While useful, overusing this phrase in formal writing can make your language repetitive. Vary your expressions.
Derived from the combination of 'within' (inside a boundary) and 'reach' (the act of extending one's hand or influence).
This phrase is commonly used in both physical and abstract contexts, such as describing proximity to objects or the attainability of goals.