全文获取类型
收费全文 | 409篇 |
免费 | 23篇 |
专业分类
儿科学 | 11篇 |
妇产科学 | 13篇 |
基础医学 | 34篇 |
口腔科学 | 3篇 |
临床医学 | 61篇 |
内科学 | 76篇 |
皮肤病学 | 18篇 |
神经病学 | 27篇 |
特种医学 | 4篇 |
外科学 | 62篇 |
综合类 | 13篇 |
一般理论 | 1篇 |
预防医学 | 49篇 |
眼科学 | 8篇 |
药学 | 42篇 |
肿瘤学 | 10篇 |
出版年
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2013年 | 15篇 |
2011年 | 3篇 |
2010年 | 12篇 |
2009年 | 14篇 |
2008年 | 6篇 |
2007年 | 4篇 |
2005年 | 3篇 |
1999年 | 3篇 |
1998年 | 11篇 |
1997年 | 10篇 |
1996年 | 9篇 |
1995年 | 8篇 |
1994年 | 12篇 |
1993年 | 11篇 |
1992年 | 9篇 |
1991年 | 13篇 |
1990年 | 14篇 |
1989年 | 11篇 |
1988年 | 6篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 6篇 |
1984年 | 2篇 |
1983年 | 7篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 9篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1977年 | 2篇 |
1976年 | 5篇 |
1972年 | 6篇 |
1971年 | 4篇 |
1969年 | 3篇 |
1968年 | 3篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1963年 | 4篇 |
1960年 | 4篇 |
1959年 | 17篇 |
1958年 | 24篇 |
1957年 | 17篇 |
1956年 | 24篇 |
1955年 | 22篇 |
1954年 | 22篇 |
1949年 | 12篇 |
1948年 | 8篇 |
排序方式: 共有432条查询结果,搜索用时 424 毫秒
1.
This article reports on a longitudinal qualitative study ofthe psychosocial factors influencing women's experience of breastfeeding.The findings illustrate the complex web of factors, both personaland environmental, that influence breastfeeding behaviour. Thesignificance of breastfeeding derives from the fact that it,in concert with the arrival of a new baby, heralds significantchanges in a woman's day-to-day life. Three major areas of change,in part precipitated by breastfeeding, were critical. Theseinclude changes in the amount of time available to the motherand the nature of the activities that fill this time, changesin a woman's body due to pregnancy and breastfeeding, and changesin the nature of a woman's personal needs. These changes constitutea substantial and often disconcerting shift in lifestyle. Thearticle examines the potential consequences of these changesfor the mother and the host of mediating factors that influenceher response to them and hence to breastfeeding. The mediatingfactors include the personal and psychological factors relatedto the attitudes, values and character traits of the mother,baby, and those close to them. Others are structural factorssuch as the absence or presence of formal and informal supportsystems that range from paid maternity leave to community drop-incentres, educational programmes, and community parks. They alsoinclude the host of cultural factors that influence the waysin which individuals and society view breastfeeding. 相似文献
2.
3.
DZIALDOWSKI ADRIAN; HEATHER NICK; CRAWFORD JOHN 《Alcohol and alcoholism (Oxford, Oxfordshire)》1988,23(1):7-16
Following Davies and Stacey's investigation (1972, Teenagersand Alcohol, HMSO, London) into perceptions of drinking andabstaining among Scottish teenagers, this study extended theirgeneral method to an investigation of the perceptions of 239Scottish adults. Results showed that the stereotypes of theheavy drinker as tough and rebellious and theabstainer as weak and cissy persist into adulthood.Heavy drinkers were seen as low on sociabilityand sexual attractiveness and abstainers wereseen as less sociable than moderate drinkers.There was also some evidence of a double standardin perceptions of male and female drinking roles. Other findingsconcerning the effects on perceptions of subjects sex and drinkingbehaviour are compared to those reported in the earlier studyand implications for the treatment of alcohol problems are discussed.It is concluded that the dimensions described by Davies andStacey represent a relatively stable structure within futureresearch where fresh initiatives in alcohol education may belocated. 相似文献
4.
PLANT MARTIN A.; BAGNALL GELLISSE; FOSTER JEAN 《Alcohol and alcoholism (Oxford, Oxfordshire)》1990,25(6):691-698
During 1988 and 1989 a survey was conducted of the drinkinghabits and alcohol-related beliefs of a national sample of teenagersin England. Data were obtained from 6,244 respondents virtuallyall aged 1416. Heavy drinkers were significantly morelikely to report drinking in a mixed sex group than were otherteenagers. They were also more likely than others to have drunkillegally in licensed premises, and were distinctive from otherteenagers in relation to their self-reported reasons for drinkingand their alcohol-related beliefs. 相似文献
5.
BACKGROUND: In the United States melanoma is the only individually reported skin cancer. There are no large state or national registries for nonmelanoma skin cancer. Nevertheless, rare, that is, nonmelanoma, nonepithelial, tumors can also be locally aggressive and metastasize. OBJECTIVES: This study's purpose was to demonstrate that Mohs surgeons can share data to create a rare skin tumor database. This database may serve as a model for a nationwide database. MATERIALS AND METHODS: We retrospectively reviewed the surgery logs of five Mohs surgery practices in the Houston, Texas, area for rare-nonmelanoma, nonepithelial-skin cancers. A total of 42,279 biopsy-proven cancers of the skin treated with Mohs micrographic surgery were reviewed. Tumor data including type, prevalence, year of treatment, and the treating Mohs surgeon(s) were compiled and analyzed. RESULTS: Forty-three types of rare tumors were identified. A total of 317 rare tumors were treated. No practice saw more than 28 rare tumor types. Atypical fibroxanthoma was the rare tumor most often treated. CONCLUSIONS: Colleagues can cooperate to create a database of rare tumors removed by Mohs micrographic surgery. A range of tumors greater than that seen in any single practice is now available for study. This should provide the impetus for a nationwide rare skin tumor database. 相似文献
6.
7.
Benzodiazepine Withdrawal: outcome in 50 patients 总被引:2,自引:0,他引:2
HEATHER ASHTON 《Addiction (Abingdon, England)》1987,82(6):665-671
Clinical outcome was assessed in SO consecutive patients who completed a course of supervized benzodiazepine withdrawal following referral to a Clinical Pharmacology Unit. The patients had been taking prescribed benzodiazepines regularly for 1–22 years and all wished to stop. On presentation, all had many symptoms which they attributed to benzodiazepines. The outcome 10 months to 3.S years later was judged as excellent (fully recovered) in 48%, good (much better) in 22%, moderate (better) in 16% and poor (no better) in 6%. One patient failed to withdraw and three relapsed onto benzodiazepine use after withdrawal. Younger age was significantly associated with a favourable outcome, but outcome was not related to duration or dosage of benzodiazepines, type of benzodiazepine, rate of withdrawal, symptom severity, psychiatric history, marital status, or sex. 相似文献
8.
9.
10.
COLLEEN O’LEARY HELEN LEONARD JENNY BOURKE HEATHER D’ANTOINE ANNE BARTU CAROL BOWER 《Developmental medicine and child neurology》2013,55(3):271-277
Aim The aim of this study was to examine the association between maternal alcohol use disorder and intellectual disability in children. Method All mothers with an International Classification of Diseases (ICD) 9 and/or 10 alcohol‐related diagnosis, a proxy for alcohol use disorder, recorded on the Western Australian health, mental health, and drug and alcohol data sets were identified through the Western Australian Data Linkage Unit (n=5614 non‐Aboriginal; n=2912 Aboriginal). A comparison cohort of mothers without an alcohol‐related diagnosis was frequency matched on maternal age within maternal Aboriginal status and year of birth of their children. Linkage with the Western Australian Midwives Notification System (1983–2001) identified all births to these mothers (n=10 664 and 7907 respectively). Linkage to the Western Australian Intellectual Disability Database and Register of Developmental Anomalies identified cases of intellectual disability with no identified genetic origin (intellectual disability) (n=1487) and fetal alcohol syndrome (n=66). Odds ratios (ORs) and 95% confidence intervals (CIs) for intellectual disability were calculated using logistic regression incorporating generalized estimating equations and used to estimate population‐attributable fractions. Results At least 3.8% (95% CI 2.84–4.89%) of cases of intellectual disability could be avoided by preventing maternal alcohol use disorder: 1.3% (95% CI 0.81–1.86%) in non‐Aboriginal and 15.6% (95% CI 10.85–20.94%) in Aboriginal children. We observed a three‐fold increase in the adjusted odds of intellectual disability in children of mothers with an alcohol‐related diagnosis recorded during pregnancy (non‐Aboriginal OR 2.89, 95% CI 1.62–5.18; Aboriginal OR 3.12, 95% CI 2.13–4.56), with a net excess proportion of 3.7% and 5.5% respectively. One‐third (32%) of children diagnosed with fetal alcohol syndrome had intellectual disability. Interpretation Maternal alcohol use disorder is the leading known risk factor for intellectual disability with no identified genetic origin. 相似文献