Can all adjectives be transformed into adverbs with 地?
Check out these dictionary entries for 地[de5]:
ABC

(adv.-forming, like English -ly)
很快地
hěn kuài de
very quickly

Oxford

AUXILIARY
[used with an adverb or adverbial phrase]
合理地安排和使用劳动力
dispose of available manpower rationally
应该历史地评价一个人。
We should judge a person from the historical point of view.

Oxford Pocket

&lt;助&gt; [used after an adjective, a noun or a phrase to form an adverbial adjunct before the verb]
狐狸偷偷地跑进果园
The fox sneaked into the orchard
他喝醉酒似地叫嚷
He shouted as if he were drunk

KEY

{grammar} (variant pronunciation of -dì) (forming an adverb from an adjectiv, e.g., gāoxìng 高興/高兴 &quot;happy&quot; + de 地 yields gāoxìngde 高興地/高兴地 &quot;happily&quot;)

CC-CEDCIT

1 -ly
2 structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct

The simple answer to your question is: yes. The more complicated answer is that many things can be turned into an adverbial adjunct by adding 地[de5].