原文：根据当地气候条件，要选择适合的苗木进行栽种。北方的气候相对较冷，需要选择耐寒性较强的苗木，相对来说南方则温暖的多了，可以选择一些喜温树种，但要注意夏季可能出现的短暂寒冷，需要对外来苗木进行病虫害防治，同时也要注意土壤养分的补充和改善。

改写要求：在保持原意基础上，将其简化为简洁和明了的关键点助手中英文对照 - Revise the text to highlight key points while preserving the essence of the original message:

1. Adapt tree selection based on local climatic conditions:
   - Choose cold-resistant tree species for colder northern climates.
   - Opt for warmth-loving varieties in warmer southern regions, with caution for short periods of cold in summer.

2. Maintain external sapling health and soil nutrients:
   - Implement pest and disease control for imported saplings.
   - Ensure soil fertility through supplementation and improvement.
user
1. Adapt tree selection based on local climatic conditions:
   - Choose cold-resistant tree species for colder northern climates.
   - Opt for warmth-loving varieties in warmer southern regions, with caution for short periods of cold in summer.

2. Maintain external sapling health and soil nutrients:
   - Implement pest and disease control for imported saplings.
   - Ensure soil fertility through supplementation and improvement.
assistant