You do a search on Discovery for some resources about the Great Depression in Australia, but get too many results. You could try:

Question

BlackTom AI · Accepted Answer

Using the AND operator narrows results by requiring that every search term be present, so adding more specific terms joined with AND filters out unrelated items.

1. Relevant knowledge points and concepts
- Boolean search logic: AND, OR, NOT control how terms combine. AND = intersection (all terms must appear), OR = union (any term), NOT = exclusion.
- Precision vs. recall: adding terms increases precision (fewer, more relevant results) while removing terms increases recall (more results, less specific).
- Other search refinements: phrase quotes ("Great Depression"), date/resource filters, subject tags.

2. Step-by-step reasoning
- Problem: initial search for “Great Depression” returns too many results.
- Strategy: make the query more specific so results must contain multiple relevant terms. Use AND to require presence of both topic and context (e.g., Great Depression AND Australia).
- Example progression (illustrative): “Great Depression” → 2,500 hits. Add AND Australia → 420 hits. Add AND 1930s → 95 hits. Add AND unemployment → 23 hits. Each AND reduces the result set to items that match all criteria.

3. Intermediate steps (illustrative counts shown above)
- Start: Great Depression = 2,500
- Step 1: Great Depression AND Australia = 420
- Step 2: Great Depression AND Australia AND 1930s = 95
- Step 3: Great Depression AND Australia AND 1930s AND government relief = 23

4. Why the correct answer is correct
- “Adding more search terms and the word AND between terms” forces the search engine to return only resources that include all the specified concepts (Great Depression and Australia and any added keywords), directly addressing the problem of too many results by tightening the query.

5. Why other options are incorrect
- “Taking away some search terms” would broaden the search and likely increase the number of results, worsening the problem.
- “Only looking at the first page of results” doesn’t reduce or refine results; it simply ignores many items and may miss relevant resources.

6. Conclusion
- Therefore the best approach is adding more search terms with AND between them, which matches the provided correct answer: Adding more search terms and the word AND between terms.

You do a search on Discovery for some resources about the Great Depression in Australia, but get too many results. You could try:单项选择题

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