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LingakuLingaku[two-syllable adverb] + [two-syllable verb]
[two-syllable noun] + [two-syllable noun]
进行 / 加以 + [two-syllable verb]
Formal written Chinese leans on four-syllable chunks. Most are two two-syllable words side by side – an adverb and a verb, or two nouns – and a sentence made of them reads as finished and official. Speech mixes in single syllables freely; reports, notices and essays mostly don't.
A two-syllable adverb wants a two-syllable verb after it: 不断提高, 逐步实现, 大力发展, 日益增加, 明显改善.
进行 "carry out" and 加以 "apply" are empty verbs of formal writing: the meaning is in the verb after them, and that verb must be two syllables.
A single-syllable word gets doubled or swapped for a two-syllable one to fill the slot: 大 becomes 大大, 快 becomes 迅速. Single syllables in a list are grouped in fours: 男女老少, 衣食住行, 春夏秋冬.
A single syllable in a two-syllable slot sounds broken in formal writing.