Step 1: Identify the initial statement and follow with a definition.
S1 offers a general library description. A logical next step is to detail its contents. Sentence Q fulfills this by enumerating "books, journals, and digital resources."
\(⇒\) \underline{Q} follows S1.
Step 2: Resolve the pronoun reference "these resources."
Sentence S uses "these resources," requiring a prior introduction. Q is the only sentence that explicitly introduces resources, making S follow Q.
\(⇒\) partial order: S1 $\to$ Q $\to$ \underline{S}.
Step 3: Introduce the users and their experience.
After resources and their handling (Q, S), the next logical element is the users. Sentence P introduces "Students and researchers … visit to find useful information," naturally linking to the resources.
Sentence R refers to "visitors" and their focus due to the peaceful environment – referencing the visitors in P, therefore R must follow P.
\(⇒\) order of the middle four: Q $\to$ S $\to$ P $\to$ R.
Step 4: Conclude with S6.
With the contents (Q), management (S), users (P), and environment (R) established, S6's "Thus" provides a suitable summary.