
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given that $S_{n}$ is the sum of the first $n$ terms of the sequence $\{a_{n}\}$, satisfying $a_{n} > 0$, $a_{n}^{2} + 2a_{n} = 4S_{n} + 3$.
  (I) Find the general formula for the sequence $\{a_{n}\}$;
  (II) Let $b_{n}= \frac{1}{a_{n}a_{n+1}}$, find the sum of the first $n$ terms of the sequence $\{b_{n}\}$.

Present the answer in LaTex format: \boxed{Your answer}
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