1 INTRODUCTION

2 QUASAR SAMPLE AND SPECTRAL ANALYSIS

2.1 Quasar sample and surveyed spectral region

2.2 Spectral analysis

3 COMPLETENESS AND REDSHIFT PATH

4 EQUIVALENT WIDTH DISTRIBUTION AND SATURABILITY

5 DISCUSSION

5.1 The redshift density evolution of absorbers

5.2 The quasar-frame velocity distribution

5.3 Dependence on the radio detection

5.4 Dependence on the UV continuum luminosity

6 SUMMARY